gex
/
gex-core
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

w.i.p. SPI, left to add: pin mappings, UU functions

Browse Source
sipo
Ondřej Hruška 6 years ago
parent 645619e9c5
commit 83c2f26c43
Signed by: MightyPork
GPG Key ID: 2C5FD5035250423D
5 changed files with 478 additions and 12 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 13
      units/digital_out/unit_dout.c
  2. 10
      units/digital_out/unit_dout.h
  3. 20
      units/i2c/unit_i2c.c
  4. 399
      units/spi/unit_spi.c
  5. 48
      units/spi/unit_spi.h

13
units/digital_out/unit_dout.c
Unescape View File

@ -62,7 +62,7 @@ static error_t DO_loadIni(Unit *unit, const char *key, const char *value)
else if (streq(key, "initial")) {
priv->initial = parse_pinmask(value, &suc);
}
else if (streq(key, "opendrain")) {
else if (streq(key, "open-drain")) {
priv->open_drain = parse_pinmask(value, &suc);
}
else {
@ -88,7 +88,7 @@ static void DO_writeIni(Unit *unit, IniWriter *iw)
iw_entry(iw, "initial", "%s", str_pinmask(priv->initial, unit_tmp512));
iw_comment(iw, "Open-drain pins");
iw_entry(iw, "opendrain", "%s", str_pinmask(priv->open_drain, unit_tmp512));
iw_entry(iw, "open-drain", "%s", str_pinmask(priv->open_drain, unit_tmp512));
}
// ------------------------------------------------------------------------
@ -234,6 +234,15 @@ error_t UU_DO_Toggle(Unit *unit, uint16_t packed)
return E_SUCCESS;
}
error_t UU_DO_GetPinCount(Unit *unit, uint8_t *count)
{
CHECK_TYPE(unit, &UNIT_DOUT);
struct priv *priv = unit->data;
uint32_t packed = port_pack(0xFFFF, priv->pins);
*count = (uint8_t)(32 - __CLZ(packed));
return E_SUCCESS;
}
enum PinCmd_ {
CMD_WRITE = 0,

10
units/digital_out/unit_dout.h
Unescape View File

@ -9,4 +9,14 @@
extern const UnitDriver UNIT_DOUT;
error_t UU_DO_Write(Unit *unit, uint16_t packed);
error_t UU_DO_Set(Unit *unit, uint16_t packed);
error_t UU_DO_Clear(Unit *unit, uint16_t packed);
error_t UU_DO_Toggle(Unit *unit, uint16_t packed);
error_t UU_DO_GetPinCount(Unit *unit, uint8_t *count);
#endif //U_DOUT_H

20
units/i2c/unit_i2c.c
Unescape View File

@ -194,23 +194,23 @@ static error_t UI2C_init(Unit *unit)
TRY(rsc_claim(unit, r_scl));
priv->port = port2periph(portname, &suc);
uint32_t ll_pin_scl = pin2ll(pin_scl, &suc);
uint32_t ll_pin_sda = pin2ll(pin_sda, &suc);
priv->ll_pin_scl = pin2ll(pin_scl, &suc);
priv->ll_pin_sda = pin2ll(pin_sda, &suc);
if (!suc) return E_BAD_CONFIG;
// configure AF
if (pin_scl < 8) LL_GPIO_SetAFPin_0_7(priv->port, ll_pin_scl, af_i2c);
else LL_GPIO_SetAFPin_8_15(priv->port, ll_pin_scl, af_i2c);
if (pin_scl < 8) LL_GPIO_SetAFPin_0_7(priv->port, priv->ll_pin_scl, af_i2c);
else LL_GPIO_SetAFPin_8_15(priv->port, priv->ll_pin_scl, af_i2c);
if (pin_sda < 8) LL_GPIO_SetAFPin_0_7(priv->port, ll_pin_sda, af_i2c);
else LL_GPIO_SetAFPin_8_15(priv->port, ll_pin_sda, af_i2c);
if (pin_sda < 8) LL_GPIO_SetAFPin_0_7(priv->port, priv->ll_pin_sda, af_i2c);
else LL_GPIO_SetAFPin_8_15(priv->port, priv->ll_pin_sda, af_i2c);
LL_GPIO_SetPinMode(priv->port, ll_pin_scl, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinMode(priv->port, ll_pin_sda, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinMode(priv->port, priv->ll_pin_scl, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinMode(priv->port, priv->ll_pin_sda, LL_GPIO_MODE_ALTERNATE);
// set as OpenDrain (this may not be needed - TODO check)
LL_GPIO_SetPinOutputType(priv->port, ll_pin_scl, LL_GPIO_OUTPUT_OPENDRAIN);
LL_GPIO_SetPinOutputType(priv->port, ll_pin_sda, LL_GPIO_OUTPUT_OPENDRAIN);
LL_GPIO_SetPinOutputType(priv->port, priv->ll_pin_scl, LL_GPIO_OUTPUT_OPENDRAIN);
LL_GPIO_SetPinOutputType(priv->port, priv->ll_pin_sda, LL_GPIO_OUTPUT_OPENDRAIN);
if (priv->periph_num == 1) {

399
units/spi/unit_spi.c
Unescape View File

@ -0,0 +1,399 @@
//
// Created by MightyPork on 2018/01/02.
//
#include "comm/messages.h"
#include "unit_base.h"
#include "utils/avrlibc.h"
#include "unit_spi.h"
// SPI master
/** Private data structure */
struct priv {
uint8_t periph_num; //!< 1 or 2
uint16_t prescaller; //!< Clock prescaller, stored as the dividing factor
bool cpol; //!< CPOL setting
bool cpha; //!< CPHA setting
bool tx_only; //!< If true, Enable only the MOSI line
bool lsb_first; //!< Option to send LSB first
char ssn_port_name; //!< SSN port
uint16_t ssn_pins; //!< SSN pin mask
SPI_TypeDef *periph;
GPIO_TypeDef *ssn_port;
GPIO_TypeDef *spi_port;
uint32_t ll_pin_miso;
uint32_t ll_pin_mosi;
uint32_t ll_pin_sck;
};
// ------------------------------------------------------------------------
/** Load from a binary buffer stored in Flash */
static void USPI_loadBinary(Unit *unit, PayloadParser *pp)
{
struct priv *priv = unit->data;
uint8_t version = pp_u8(pp);
(void)version;
priv->periph_num = pp_u8(pp);
priv->prescaller = pp_u16(pp);
priv->cpol = pp_bool(pp);
priv->cpha = pp_bool(pp);
priv->tx_only = pp_bool(pp);
priv->lsb_first = pp_bool(pp);
priv->ssn_port_name = pp_char(pp);
priv->ssn_pins = pp_u16(pp);
}
/** Write to a binary buffer for storing in Flash */
static void USPI_writeBinary(Unit *unit, PayloadBuilder *pb)
{
struct priv *priv = unit->data;
pb_u8(pb, 0); // version
pb_u8(pb, priv->periph_num);
pb_u16(pb, priv->prescaller);
pb_bool(pb, priv->cpol);
pb_bool(pb, priv->cpha);
pb_bool(pb, priv->tx_only);
pb_bool(pb, priv->lsb_first);
pb_char(pb, priv->ssn_port_name);
pb_u16(pb, priv->ssn_pins);
}
// ------------------------------------------------------------------------
/** Parse a key-value pair from the INI file */
static error_t USPI_loadIni(Unit *unit, const char *key, const char *value)
{
bool suc = true;
struct priv *priv = unit->data;
if (streq(key, "device")) {
priv->periph_num = (uint8_t) avr_atoi(value);
}
else if (streq(key, "prescaller")) {
priv->prescaller = (uint16_t ) avr_atoi(value);
}
else if (streq(key, "cpol")) {
priv->cpol = (bool) avr_atoi(value);
}
else if (streq(key, "cpha")) {
priv->cpha = (bool) avr_atoi(value);
}
else if (streq(key, "tx-only")) {
priv->tx_only = str_parse_yn(value, &suc);
}
else if (streq(key, "lsb-first")) {
priv->lsb_first = str_parse_yn(value, &suc);
}
else if (streq(key, "port")) {
suc = parse_port(value, &priv->ssn_port_name);
}
else if (streq(key, "pins")) {
priv->ssn_pins = parse_pinmask(value, &suc);
}
else {
return E_BAD_KEY;
}
if (!suc) return E_BAD_VALUE;
return E_SUCCESS;
}
/** Generate INI file section for the unit */
static void USPI_writeIni(Unit *unit, IniWriter *iw)
{
struct priv *priv = unit->data;
iw_comment(iw, "Peripheral number (SPIx)");
iw_entry(iw, "device", "%d", (int)priv->periph_num);
iw_comment(iw, "Prescaller: 2,4,8,...,256");
iw_entry(iw, "prescaller", "%d", (int)priv->prescaller);
iw_comment(iw, "Clock polarity: 0,1 (clock idle level)");
iw_entry(iw, "cpol", "%d", (int)priv->cpol);
iw_comment(iw, "Clock phase: 0,1 (active edge, 0-first, 1-second)");
iw_entry(iw, "cpha", "%d", (int)priv->cpha);
iw_comment(iw, "Transmit only, disable MISO");
iw_entry(iw, "tx-only", str_yn(priv->tx_only));
iw_comment(iw, "Use LSB-first bit order");
iw_entry(iw, "lsb-first", str_yn(priv->lsb_first));
iw_comment(iw, "Slave Select port name");
iw_entry(iw, "port", "%c", priv->ssn_port_name);
iw_comment(iw, "Slave select pins (comma separated, supports ranges)");
iw_entry(iw, "pins", "%s", str_pinmask(priv->ssn_pins, unit_tmp512));
}
// ------------------------------------------------------------------------
/** Allocate data structure and set defaults */
static error_t USPI_preInit(Unit *unit)
{
bool suc = true;
struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv), &suc);
if (!suc) return E_OUT_OF_MEM;
// some defaults
priv->periph_num = 1;
priv->prescaller = 64;
priv->cpol = 0;
priv->cpha = 0;
priv->tx_only = false;
priv->lsb_first = false;
priv->ssn_port_name = 'A';
priv->ssn_pins = 0x0001;
return E_SUCCESS;
}
/** Finalize unit set-up */
static error_t USPI_init(Unit *unit)
{
bool suc = true;
struct priv *priv = unit->data;
if (!(priv->periph_num >= 1 && priv->periph_num <= 2)) {
dbg("!! Bad SPI periph");
// XXX some chips have also SPI3
return E_BAD_CONFIG;
}
// assign and claim the peripheral
if (priv->periph_num == 1) {
TRY(rsc_claim(unit, R_SPI1));
priv->periph = SPI1;
}
else if (priv->periph_num == 2) {
TRY(rsc_claim(unit, R_SPI2));
priv->periph = SPI2;
}
// This is written for F072, other platforms will need adjustments
// Configure SPI own pins (AF)
char spi_portname;
uint8_t pin_miso;
uint8_t pin_mosi;
uint8_t pin_sck;
uint32_t af_spi;
// TODO
#if GEX_PLAT_F072_DISCOVERY
#error "NO IMPL"
#elif GEX_PLAT_F103_BLUEPILL
#error "NO IMPL"
#elif GEX_PLAT_F303_DISCOVERY
#error "NO IMPL"
#elif GEX_PLAT_F407_DISCOVERY
#error "NO IMPL"
#else
#error "BAD PLATFORM!"
#endif
// first, we have to claim the pins
Resource r_mosi = pin2resource(spi_portname, pin_mosi, &suc);
Resource r_miso = pin2resource(spi_portname, pin_miso, &suc);
Resource r_sck = pin2resource(spi_portname, pin_sck, &suc);
if (!suc) return E_BAD_CONFIG;
TRY(rsc_claim(unit, r_mosi));
TRY(rsc_claim(unit, r_miso));
TRY(rsc_claim(unit, r_sck));
priv->spi_port = port2periph(spi_portname, &suc);
priv->ll_pin_mosi = pin2ll(pin_mosi, &suc);
priv->ll_pin_miso = pin2ll(pin_miso, &suc);
priv->ll_pin_sck = pin2ll(pin_sck, &suc);
if (!suc) return E_BAD_CONFIG;
// configure AF
if (pin_mosi < 8) LL_GPIO_SetAFPin_0_7(priv->spi_port, priv->ll_pin_mosi, af_spi);
else LL_GPIO_SetAFPin_8_15(priv->spi_port, priv->ll_pin_mosi, af_spi);
if (pin_miso < 8) LL_GPIO_SetAFPin_0_7(priv->spi_port, priv->ll_pin_miso, af_spi);
else LL_GPIO_SetAFPin_8_15(priv->spi_port, priv->ll_pin_miso, af_spi);
if (pin_sck < 8) LL_GPIO_SetAFPin_0_7(priv->spi_port, priv->ll_pin_sck, af_spi);
else LL_GPIO_SetAFPin_8_15(priv->spi_port, priv->ll_pin_sck, af_spi);
LL_GPIO_SetPinMode(priv->spi_port, priv->ll_pin_mosi, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinMode(priv->spi_port, priv->ll_pin_miso, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinMode(priv->spi_port, priv->ll_pin_sck, LL_GPIO_MODE_ALTERNATE);
if (priv->periph_num == 1) {
__HAL_RCC_SPI1_CLK_ENABLE();
} else {
__HAL_RCC_SPI2_CLK_ENABLE();
}
// configure SSN GPIOs
{
priv->ssn_port = port2periph(priv->ssn_port_name, &suc);
if (!suc) return E_BAD_CONFIG;
// Claim all needed pins
TRY(rsc_claim_gpios(unit, priv->ssn_port_name, priv->ssn_pins));
uint16_t mask = 1;
for (int i = 0; i < 16; i++, mask <<= 1) {
if (priv->ssn_pins & mask) {
uint32_t ll_pin = pin2ll((uint8_t) i, &suc);
LL_GPIO_SetPinMode(priv->ssn_port, ll_pin, LL_GPIO_MODE_OUTPUT);
LL_GPIO_SetPinOutputType(priv->ssn_port, ll_pin, LL_GPIO_OUTPUT_PUSHPULL);
LL_GPIO_SetPinSpeed(priv->ssn_port, ll_pin, LL_GPIO_SPEED_FREQ_HIGH);
}
}
// Set the initial state - all high
priv->ssn_port->ODR &= priv->ssn_pins;
}
// Configure SPI - must be configured under reset
LL_SPI_Disable(priv->periph);
{
uint32_t presc = priv->prescaller;
uint32_t lz = __CLZ(presc);
if (lz < 23) lz = 23;
if (lz > 30) lz = 30;
presc = (32 - lz - 2);
dbg("Presc is %d", (int) presc);
LL_SPI_SetBaudRatePrescaler(priv->periph, presc);
LL_SPI_SetClockPolarity(priv->periph, priv->cpol ?
LL_SPI_POLARITY_HIGH :
LL_SPI_POLARITY_LOW);
LL_SPI_SetClockPhase(priv->periph, priv->cpha ?
LL_SPI_PHASE_1EDGE :
LL_SPI_PHASE_2EDGE);
LL_SPI_SetTransferDirection(priv->periph, priv->tx_only ?
LL_SPI_HALF_DUPLEX_TX :
LL_SPI_FULL_DUPLEX);
LL_SPI_SetTransferBitOrder(priv->periph, priv->lsb_first ?
LL_SPI_LSB_FIRST :
LL_SPI_MSB_FIRST);
// TODO data size?
LL_SPI_SetMode(priv->periph, LL_SPI_MODE_MASTER);
}
LL_SPI_Enable(priv->periph);
return E_SUCCESS;
}
/** Tear down the unit */
static void USPI_deInit(Unit *unit)
{
struct priv *priv = unit->data;
// de-init the pins & peripheral only if inited correctly
if (unit->status == E_SUCCESS) {
assert_param(priv->periph);
assert_param(priv->spi_port);
assert_param(priv->ssn_port);
LL_SPI_DeInit(priv->periph);
if (priv->periph_num == 1) {
__HAL_RCC_SPI1_CLK_DISABLE();
} else {
__HAL_RCC_SPI2_CLK_DISABLE();
}
LL_GPIO_SetPinMode(priv->spi_port, priv->ll_pin_mosi, LL_GPIO_MODE_ANALOG);
LL_GPIO_SetPinMode(priv->spi_port, priv->ll_pin_mosi, LL_GPIO_MODE_ANALOG);
LL_GPIO_SetPinMode(priv->spi_port, priv->ll_pin_sck, LL_GPIO_MODE_ANALOG);
// de-init all SSN pins
bool suc = true;
uint16_t mask = 1;
for (int i = 0; i < 16; i++, mask <<= 1) {
if (priv->ssn_pins & mask) {
uint32_t ll_pin = pin2ll((uint8_t) i, &suc);
assert_param(suc);
// configure the pin as analog
LL_GPIO_SetPinMode(priv->ssn_port, ll_pin, LL_GPIO_MODE_ANALOG);
}
}
}
// Release all resources
rsc_teardown(unit);
// Free memory
free(unit->data);
unit->data = NULL;
}
// ------------------------------------------------------------------------
enum PinCmd_ {
CMD_WRITE = 0,
};
/** Handle a request message */
static error_t USPI_handleRequest(Unit *unit, TF_ID frame_id, uint8_t command, PayloadParser *pp)
{
uint16_t addr;
uint32_t len;
uint8_t regnum;
uint32_t size;
// NOTE: 10-bit addresses must have the highest bit set to 1 for indication (0x8000 | addr)
switch (command) {
/** Write byte(s) - addr:u16, byte(s) */
case CMD_WRITE:
addr = pp_u16(pp);
const uint8_t *bb = pp_tail(pp, &len);
return UU_SPI_Write(unit, addr, bb, len); // TODo implement function + SPI pins mapping
default:
return E_UNKNOWN_COMMAND;
}
}
// ------------------------------------------------------------------------
/** Unit template */
const UnitDriver UNIT_SPI = {
.name = "SPI",
.description = "SPI master",
// Settings
.preInit = USPI_preInit,
.cfgLoadBinary = USPI_loadBinary,
.cfgWriteBinary = USPI_writeBinary,
.cfgLoadIni = USPI_loadIni,
.cfgWriteIni = USPI_writeIni,
// Init
.init = USPI_init,
.deInit = USPI_deInit,
// Function
.handleRequest = USPI_handleRequest,
};

48
units/spi/unit_spi.h
Unescape View File

@ -0,0 +1,48 @@
//
// Created by MightyPork on 2018/01/02.
//
#ifndef GEX_F072_UNIT_SPI_H
#define GEX_F072_UNIT_SPI_H
#include "unit.h"
extern const UnitDriver UNIT_SPI;
// Unit-to-Unit API
/**
* Raw read/write via SPI.
* It's possible to simultaneously write and read, or skip bytes in either direction.
*
* Example scenarios:
*
* req 2, skip 2, read 3
* |<-- req_len --->|
* [ write ][ write ] . . . . . . . .
* . . . . . . . . . [ read ][ read ][ read ]
* |<-- resp_skip ->|<------ resp_len ----->|
*
* req 2, skip 0, read 2
* |<-- req_len --->|
* [ write ][ write ]
* [ read ][ read ]
* |<-- resp_len -->|
*
* @param unit - SPI unit
* @param slave_num - slave number (SS pin index)
* @param request - request bytes buffer
* @param response - response bytes buffer
* @param req_len - number of bytes in the request. Will be right-padded with zeros.
* @param resp_skip - response bytes to discard before starting to capture them
* @param resp_len - number of bytes to capture, after discarding resp_skip received bytes
* @return success
*/
error_t UU_SPI_Write(Unit *unit, uint8_t slave_num,
const uint8_t *request,
uint8_t *response,
uint32_t req_len,
uint32_t resp_skip,
uint32_t resp_len);
#endif //GEX_F072_UNIT_SPI_H
Write Preview
Loading…
Cancel
Save