parent
f1b8db78d4
commit
8643d16989
GPG Key ID:
2C5FD5035250423D
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//
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// Created by MightyPork on 2018/02/03.
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//
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#include "platform.h" |
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#include "unit_base.h" |
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#define I2C_INTERNAL |
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#include "_i2c_internal.h" |
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#include "_i2c_init.h" |
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/** Allocate data structure and set defaults */ |
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error_t UI2C_preInit(Unit *unit) |
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{ |
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struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv)); |
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if (priv == NULL) return E_OUT_OF_MEM; |
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// some defaults
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priv->periph_num = 1; |
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priv->speed = 1; |
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priv->anf = true; |
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priv->dnf = 0; |
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return E_SUCCESS; |
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} |
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/** Finalize unit set-up */ |
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error_t UI2C_init(Unit *unit) |
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{ |
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bool suc = true; |
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struct priv *priv = unit->data; |
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if (!(priv->periph_num >= 1 && priv->periph_num <= 2)) { |
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dbg("!! Bad I2C periph"); // TODO report
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return E_BAD_CONFIG; |
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} |
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if (!(priv->speed >= 1 && priv->speed <= 3)) { |
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dbg("!! Bad I2C speed"); |
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return E_BAD_CONFIG; |
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} |
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if (priv->dnf > 15) { |
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dbg("!! Bad I2C DNF bw"); |
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return E_BAD_CONFIG; |
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} |
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// assign and claim the peripheral
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if (priv->periph_num == 1) { |
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TRY(rsc_claim(unit, R_I2C1)); |
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priv->periph = I2C1; |
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} else { |
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TRY(rsc_claim(unit, R_I2C2)); |
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priv->periph = I2C2; |
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} |
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// This is written for F072, other platforms will need adjustments
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char portname; |
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uint8_t pin_scl; |
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uint8_t pin_sda; |
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uint32_t af_i2c; |
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uint32_t timing; // magic constant from CubeMX
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#if GEX_PLAT_F072_DISCOVERY |
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// scl - 6 or 8 for I2C1, 10 for I2C2
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// sda - 7 or 9 for I2C1, 11 for I2C2
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if (priv->periph_num == 1) { |
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// I2C1
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if (priv->remap == 0) { |
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af_i2c = LL_GPIO_AF_1; |
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portname = 'B'; |
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pin_scl = 6; |
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pin_sda = 7; |
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} else if (priv->remap == 1) { |
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af_i2c = LL_GPIO_AF_1; |
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portname = 'B'; |
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pin_scl = 8; |
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pin_sda = 9; |
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} else { |
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return E_BAD_CONFIG; |
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} |
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} else { |
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// I2C2
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if (priv->remap == 0) { |
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af_i2c = LL_GPIO_AF_1; |
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portname = 'B'; |
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pin_scl = 10; |
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pin_sda = 11; |
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} else if (priv->remap == 1) { |
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af_i2c = LL_GPIO_AF_5; |
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portname = 'B'; |
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pin_scl = 13; |
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pin_sda = 14; |
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} else { |
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return E_BAD_CONFIG; |
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} |
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} |
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if (priv->speed == 1) |
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timing = 0x00301D2B; // Standard
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else if (priv->speed == 2) |
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timing = 0x0000020B; // Fast
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else |
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timing = 0x00000001; // Fast+
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#elif GEX_PLAT_F103_BLUEPILL |
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#error "NO IMPL" |
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#elif GEX_PLAT_F303_DISCOVERY |
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#error "NO IMPL" |
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#elif GEX_PLAT_F407_DISCOVERY |
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#error "NO IMPL" |
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#else |
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#error "BAD PLATFORM!" |
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#endif |
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// first, we have to claim the pins
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TRY(rsc_claim_pin(unit, portname, pin_sda)); |
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TRY(rsc_claim_pin(unit, portname, pin_scl)); |
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hw_configure_gpio_af(portname, pin_sda, af_i2c); |
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hw_configure_gpio_af(portname, pin_scl, af_i2c); |
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hw_periph_clock_enable(priv->periph); |
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/* Disable the selected I2Cx Peripheral */ |
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LL_I2C_Disable(priv->periph); |
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LL_I2C_ConfigFilters(priv->periph, |
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(priv->anf ? LL_I2C_ANALOGFILTER_ENABLE : LL_I2C_ANALOGFILTER_DISABLE), |
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priv->dnf); |
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LL_I2C_SetTiming(priv->periph, timing); |
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//LL_I2C_DisableClockStretching(priv->periph);
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LL_I2C_Enable(priv->periph); |
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LL_I2C_DisableOwnAddress1(priv->periph); // OA not used
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LL_I2C_SetMode(priv->periph, LL_I2C_MODE_I2C); // not using SMBus
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return E_SUCCESS; |
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} |
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/** Tear down the unit */ |
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void UI2C_deInit(Unit *unit) |
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{ |
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struct priv *priv = unit->data; |
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// de-init the pins & peripheral only if inited correctly
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if (unit->status == E_SUCCESS) { |
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assert_param(priv->periph); |
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LL_I2C_DeInit(priv->periph); |
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hw_periph_clock_disable(priv->periph); |
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} |
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// Release all resources
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rsc_teardown(unit); |
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// Free memory
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free_ck(unit->data); |
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} |
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@ -0,0 +1,24 @@ |
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//
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// Created by MightyPork on 2018/02/03.
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//
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#ifndef GEX_F072_I2C_INIT_H |
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#define GEX_F072_I2C_INIT_H |
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#ifndef I2C_INTERNAL |
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#error bad include! |
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#endif |
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#include "unit_base.h" |
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/** Allocate data structure and set defaults */ |
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error_t UI2C_preInit(Unit *unit); |
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/** Finalize unit set-up */ |
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error_t UI2C_init(Unit *unit); |
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/** Tear down the unit */ |
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void UI2C_deInit(Unit *unit); |
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#endif //GEX_F072_I2C_INIT_H
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@ -0,0 +1,107 @@ |
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//
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// Created by MightyPork on 2018/02/03.
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//
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#include "platform.h" |
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#include "unit_base.h" |
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#define I2C_INTERNAL |
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#include "_i2c_internal.h" |
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#include "_i2c_settings.h" |
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/** Load from a binary buffer stored in Flash */ |
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void UI2C_loadBinary(Unit *unit, PayloadParser *pp) |
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{ |
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struct priv *priv = unit->data; |
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uint8_t version = pp_u8(pp); |
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(void)version; |
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priv->periph_num = pp_u8(pp); |
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priv->anf = pp_bool(pp); |
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priv->dnf = pp_u8(pp); |
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priv->speed = pp_u8(pp); |
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if (version >= 1) { |
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priv->remap = pp_u8(pp); |
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} |
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} |
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/** Write to a binary buffer for storing in Flash */ |
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void UI2C_writeBinary(Unit *unit, PayloadBuilder *pb) |
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{ |
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struct priv *priv = unit->data; |
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pb_u8(pb, 1); // version
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pb_u8(pb, priv->periph_num); |
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pb_bool(pb, priv->anf); |
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pb_u8(pb, priv->dnf); |
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pb_u8(pb, priv->speed); |
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pb_u8(pb, priv->remap); |
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} |
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// ------------------------------------------------------------------------
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/** Parse a key-value pair from the INI file */ |
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error_t UI2C_loadIni(Unit *unit, const char *key, const char *value) |
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{ |
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bool suc = true; |
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struct priv *priv = unit->data; |
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if (streq(key, "device")) { |
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priv->periph_num = (uint8_t) avr_atoi(value); |
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} |
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else if (streq(key, "remap")) { |
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priv->remap = (uint8_t) avr_atoi(value); |
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} |
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else if (streq(key, "analog-filter")) { |
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priv->anf = str_parse_yn(value, &suc); |
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} |
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else if (streq(key, "digital-filter")) { |
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priv->dnf = (uint8_t) avr_atoi(value); |
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} |
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else if (streq(key, "speed")) { |
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priv->speed = (uint8_t) avr_atoi(value); |
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} |
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else { |
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return E_BAD_KEY; |
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} |
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if (!suc) return E_BAD_VALUE; |
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return E_SUCCESS; |
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} |
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/** Generate INI file section for the unit */ |
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void UI2C_writeIni(Unit *unit, IniWriter *iw) |
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{ |
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struct priv *priv = unit->data; |
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iw_comment(iw, "Peripheral number (I2Cx)"); |
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iw_entry(iw, "device", "%d", (int)priv->periph_num); |
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iw_comment(iw, "Pin mappings (SCL,SDA)"); |
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#if GEX_PLAT_F072_DISCOVERY |
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iw_comment(iw, " I2C1: (0) B6,B7 (1) B8,B9"); |
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iw_comment(iw, " I2C2: (0) B10,B11 (1) B13,B14"); |
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#elif GEX_PLAT_F103_BLUEPILL |
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#error "NO IMPL" |
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#elif GEX_PLAT_F303_DISCOVERY |
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#error "NO IMPL" |
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#elif GEX_PLAT_F407_DISCOVERY |
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#error "NO IMPL" |
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#else |
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#error "BAD PLATFORM!" |
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#endif |
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iw_entry(iw, "remap", "%d", (int)priv->remap); |
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iw_cmt_newline(iw); |
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iw_comment(iw, "Speed: 1-Standard, 2-Fast, 3-Fast+"); |
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iw_entry(iw, "speed", "%d", (int)priv->speed); |
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iw_comment(iw, "Analog noise filter enable (Y,N)"); |
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iw_entry(iw, "analog-filter", "%s", str_yn(priv->anf)); |
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iw_comment(iw, "Digital noise filter bandwidth (0-15)"); |
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iw_entry(iw, "digital-filter", "%d", (int)priv->dnf); |
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} |
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@ -0,0 +1,28 @@ |
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//
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// Created by MightyPork on 2018/02/03.
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//
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#ifndef GEX_F072_I2C_SETTINGS_H |
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#define GEX_F072_I2C_SETTINGS_H |
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#ifndef I2C_INTERNAL |
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#error bad include! |
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#endif |
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#include "unit_base.h" |
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/** Load from a binary buffer stored in Flash */ |
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void UI2C_loadBinary(Unit *unit, PayloadParser *pp); |
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/** Write to a binary buffer for storing in Flash */ |
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void UI2C_writeBinary(Unit *unit, PayloadBuilder *pb); |
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// ------------------------------------------------------------------------
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/** Parse a key-value pair from the INI file */ |
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error_t UI2C_loadIni(Unit *unit, const char *key, const char *value); |
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/** Generate INI file section for the unit */ |
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void UI2C_writeIni(Unit *unit, IniWriter *iw); |
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#endif //GEX_F072_I2C_SETTINGS_H
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