gex zero support, also nrf remapping based on platform and optional disable

TinyFrame/TF_Integration.c

@@ -28,9 +28,11 @@ void TF_WriteImpl(TinyFrame *tf, const uint8_t *buff, uint32_t len)
     else if (gActiveComport == COMPORT_USART) {
         iface_uart_transmit(buff, len);
     }
+#if SUPPORT_NRF
     else if (gActiveComport == COMPORT_NORDIC) {
         iface_nordic_transmit(buff, len);
     }
+#endif // SUPPORT_NRF
     else {
         // TODO other transports
         trap("not implemented.");

comm/iface_nordic.c

@@ -11,6 +11,8 @@
 #include "system_settings.h"
 #include "utils/hexdump.h"
 
+#if SUPPORT_NRF
+
 extern osSemaphoreId semVcomTxReadyHandle;
 
 #define RX_PIPE_NUM 0
@@ -70,15 +72,17 @@ bool iface_nordic_init(void)
     hw_periph_clock_enable(NRF_SPI);
 
     // SPI pins
-    assert_param(E_SUCCESS == hw_configure_gpiorsc_af(NRF_R_SCK, NRF_SPI_AF));
+    assert_param(E_SUCCESS == hw_configure_gpiorsc_af(NRF_R_SCK, NRF_SCK_AF));
-    assert_param(E_SUCCESS == hw_configure_gpiorsc_af(NRF_R_MOSI, NRF_SPI_AF));
+    assert_param(E_SUCCESS == hw_configure_gpiorsc_af(NRF_R_MOSI, NRF_MOSI_AF));
-    assert_param(E_SUCCESS == hw_configure_gpiorsc_af(NRF_R_MISO, NRF_SPI_AF));
+    assert_param(E_SUCCESS == hw_configure_gpiorsc_af(NRF_R_MISO, NRF_MISO_AF));
 
     // Manual pins
     LL_GPIO_SetPinMode(NRF_NSS_GPIO_Port, NRF_NSS_Pin, LL_GPIO_MODE_OUTPUT);
     LL_GPIO_SetPinMode(NRF_CE_GPIO_Port, NRF_CE_Pin, LL_GPIO_MODE_OUTPUT);
+    LL_GPIO_SetPinMode(NRF_RST_GPIO_Port, NRF_RST_Pin, LL_GPIO_MODE_OUTPUT);
     LL_GPIO_SetPinMode(NRF_IRQ_GPIO_Port, NRF_IRQ_Pin, LL_GPIO_MODE_INPUT);
 
+    // set up SPI
     LL_SPI_Disable(NRF_SPI);
     {
         LL_SPI_SetBaudRatePrescaler(NRF_SPI, LL_SPI_BAUDRATEPRESCALER_DIV32);
@@ -97,11 +101,19 @@ bool iface_nordic_init(void)
     }
     LL_SPI_Enable(NRF_SPI);
 
+    // reset the radio / enable its power supply
+    NRF_Reset(1);
+    LL_mDelay(5);
+    NRF_Reset(0);
 
     dbg("configure nrf module");
 
     // Now configure the radio
-    NRF_Init(NRF_SPEED_2M); // TODO configurable speed
+    if (!NRF_Init(NRF_SPEED_2M)) {// TODO configurable speed - also maybe better to use slower
+        dbg("--- NRF not present!");
+        return false;
+    }
+
     NRF_SetChannel(SystemSettings.nrf_channel);
     NRF_SetBaseAddress(SystemSettings.nrf_network);
     NRF_SetRxAddress(RX_PIPE_NUM, SystemSettings.nrf_address);
@@ -133,6 +145,7 @@ void iface_nordic_deinit(void)
     hw_deinit_pin_rsc(NRF_R_NSS);
     hw_deinit_pin_rsc(NRF_R_CE);
     hw_deinit_pin_rsc(NRF_R_IRQ);
+    hw_deinit_pin_rsc(NRF_R_RST);
 }
 
 // FIXME
@@ -173,3 +186,5 @@ void iface_nordic_transmit(const uint8_t *buff, uint32_t len)
     // give when it's done
     xSemaphoreGive(semVcomTxReadyHandle); // similar to how it's done in USB - this is called in the Tx Done handler
 }
+
+#endif // SUPPORT_NRF

comm/iface_nordic.h

@@ -7,6 +7,8 @@
 
 #include "platform.h"
 
+#if SUPPORT_NRF
+
 void iface_nordic_claim_resources(void);
 
 void iface_nordic_free_resources(void);
@@ -17,4 +19,6 @@ bool iface_nordic_init(void);
 
 void iface_nordic_transmit(const uint8_t *buff, uint32_t len);
 
+#endif // SUPPORT_NRF
+
 #endif //GEX_F072_IFACE_NORDIC_H

comm/interfaces.c

@@ -16,6 +16,7 @@
 #include "iface_usb.h"
 #include "iface_nordic.h"
 
+// those correspond to the ENUM values
 const char * COMPORT_NAMES[] = {
     "NONE",
     "USB",
@@ -24,7 +25,6 @@ const char * COMPORT_NAMES[] = {
     "LORA",
 };
 
-
 enum ComportSelection gActiveComport = COMPORT_USB; // start with USB so the handlers work correctly initially
 
 static uint32_t last_switch_time = 0; // started with USB
@@ -86,9 +86,11 @@ void com_claim_resources_for_alt_transfers(void)
         iface_uart_claim_resources();
     }
 
+#if SUPPORT_NRF
     if (SystemSettings.use_comm_nordic) {
         iface_nordic_claim_resources();
     }
+#endif // SUPPORT_NRF
 }
 
 /** Release resources allocated for alternate transfers */
@@ -98,9 +100,11 @@ void com_release_resources_for_alt_transfers(void)
         iface_uart_free_resources();
     }
 
+#if SUPPORT_NRF
     if (SystemSettings.use_comm_nordic) {
         iface_nordic_free_resources();
     }
+#endif // SUPPORT_NRF
 }
 
 
@@ -115,9 +119,11 @@ static bool configure_interface(enum ComportSelection iface)
     else if (gActiveComport == COMPORT_USART) {
         iface_uart_deinit();
     }
+#if SUPPORT_NRF
     else if (gActiveComport == COMPORT_NORDIC) {
         iface_nordic_deinit();
     }
+#endif // SUPPORT_NRF
 
 
     gActiveComport = iface;
@@ -130,9 +136,11 @@ static bool configure_interface(enum ComportSelection iface)
     else if (iface == COMPORT_USART) {
         return iface_uart_init();
     }
+#if SUPPORT_NRF
     else if (iface == COMPORT_NORDIC) {
         return iface_nordic_init();
     }
+#endif // SUPPORT_NRF
 #if 0
     else if (iface == COMPORT_LORA) {
         // Try to configure nordic

comm/nrf.c

@@ -73,6 +73,17 @@ static uint8_t spi(uint8_t tx) {
     return LL_SPI_ReceiveData8(NRF_SPI);
 }
 
+void NRF_Reset(bool enable_reset)
+{
+    if (enable_reset) {
+        // go HIGH - this closes the PMOS
+        LL_GPIO_SetOutputPin(NRF_RST_GPIO_Port, NRF_RST_Pin);
+    } else {
+        // LOW - open PMOS, enable power
+        LL_GPIO_ResetOutputPin(NRF_RST_GPIO_Port, NRF_RST_Pin);
+    }
+}
+
 //-------
 
 /*
@@ -492,7 +503,7 @@ bool NRF_SendPacket(uint8_t PipeNum, const uint8_t *Packet, uint8_t Length)
     return 0 != (st & RD_STATUS_TX_DS); // success
 }
 
-void NRF_Init(uint8_t pSpeed)
+bool NRF_Init(uint8_t pSpeed)
 {
     // Set the required output pins
     NSS(1);
@@ -505,6 +516,10 @@ void NRF_Init(uint8_t pSpeed)
         nrf_pipe_enabled[i] = 0;
     }
 
+    // this is a test if there's anything present
+    uint8_t awreg = NRF_ReadRegister(RG_SETUP_AW);
+    if (awreg == 0 || awreg > 3) return false;
+
     // clear flags etc
     NRF_PowerDown();
     CHIPSELECT { spi(CMD_FLUSH_RX); }
@@ -527,4 +542,6 @@ void NRF_Init(uint8_t pSpeed)
 //    for (int i = 0; i < 6; i++) {
 //        NRF_WriteRegister(RG_RX_PW_P0+i, 32);      // Receive 32 byte packets - XXX this is probably not needed with dynamic length
 //    }
+
+    return true;
 }

comm/nrf.h

@@ -32,13 +32,21 @@
  * Initialize the NRF module
  *
  * @param pSpeed
+ * @return success (0 if device not detected)
  */
-void NRF_Init(uint8_t pSpeed);
+bool NRF_Init(uint8_t pSpeed);
 
 #define NRF_SPEED_500k 0b00100110
 #define NRF_SPEED_2M 0b00001110
 #define NRF_SPEED_1M 0b00000110
 
+/**
+ * Set the reset pin (this is a PMOS controlling its power)
+ *
+ * @param enable_reset 1 to go into reset, 0 to enter operational state (will need some time to become ready)
+ */
+void NRF_Reset(bool enable_reset);
+
 /**
  * Set reception address
  * @param pipenum - pipe to set

comm/nrf_pins.h

@@ -7,7 +7,9 @@
 
 #include "platform.h"
 
-// TODO move those to plat_compat?
+#if defined(GEX_PLAT_F072_DISCOVERY) || defined(GEX_PLAT_F072_HUB)
+
+    // This config was used only for development when NRF was enabled for those platforms. It is normally disabled.
     #define NRF_SPI            SPI1
     #define NRF_R_SPI          R_SPI1
 
@@ -25,9 +27,49 @@
     #define NRF_CE_GPIO_Port   GPIOB
     #define NRF_R_CE           R_PB12
 
+    #define NRF_RST_Pin        LL_GPIO_PIN_13
+    #define NRF_RST_GPIO_Port  GPIOB
+    #define NRF_R_RST          R_PB13
+
     #define NRF_R_SCK          R_PA5
+    #define NRF_SCK_AF         LL_GPIO_AF_0
     #define NRF_R_MISO         R_PA6
+    #define NRF_MISO_AF        LL_GPIO_AF_0
     #define NRF_R_MOSI         R_PA7
-#define NRF_SPI_AF         LL_GPIO_AF_0
+    #define NRF_MOSI_AF        LL_GPIO_AF_0
+
+#elif defined(GEX_PLAT_F072_ZERO)
+
+    #define NRF_SPI            SPI2
+    #define NRF_R_SPI          R_SPI2
+
+    #define NRF_IRQ_Pin        LL_GPIO_PIN_15
+    #define NRF_IRQ_GPIO_Port  GPIOC
+    #define NRF_R_IRQ          R_PC15
+    #define NRF_EXTI_LINENUM   15
+    #define NRF_SYSCFG_EXTI_PORT LL_SYSCFG_EXTI_PORTC
+
+    #define NRF_NSS_Pin        LL_GPIO_PIN_13
+    #define NRF_NSS_GPIO_Port  GPIOC
+    #define NRF_R_NSS          R_PC13
+
+    #define NRF_CE_Pin         LL_GPIO_PIN_14
+    #define NRF_CE_GPIO_Port   GPIOC
+    #define NRF_R_CE           R_PC14
+
+    #define NRF_RST_Pin        LL_GPIO_PIN_12
+    #define NRF_RST_GPIO_Port  GPIOC
+    #define NRF_R_RST          R_PC12
+
+    #define NRF_R_SCK          R_PB13
+    #define NRF_SCK_AF         LL_GPIO_AF_0
+    #define NRF_R_MISO         R_PC2
+    #define NRF_MISO_AF        LL_GPIO_AF_1
+    #define NRF_R_MOSI         R_PC3
+    #define NRF_MOSI_AF        LL_GPIO_AF_1
+
+#else
+    #error "Missing NRF config for this platform."
+#endif
 
 #endif //GEX_F072_NRF_PINS_H

framework/system_settings.c

@@ -196,6 +196,7 @@ void systemsettings_build_ini(IniWriter *iw)
     iw_entry_s(iw, "com-uart", str_yn(SystemSettings.use_comm_uart));
     iw_entry_d(iw, "com-uart-baud", SystemSettings.comm_uart_baud);
 
+#if SUPPORT_NRF
     iw_cmt_newline(iw);
     iw_comment(iw, "nRF24L01+ radio");
     iw_entry_s(iw, "com-nrf", str_yn(SystemSettings.use_comm_nordic));
@@ -212,6 +213,7 @@ void systemsettings_build_ini(IniWriter *iw)
 
     iw_comment(iw, "Node address (1-255)");
     iw_entry(iw, "nrf-address", "%d", (int)SystemSettings.nrf_address);
+#endif // SUPPORT_NRF
 
     // those aren't implement yet, don't tease the user
     // TODO show pin-out, extra settings if applicable
@@ -274,6 +276,7 @@ bool systemsettings_load_ini(const char *restrict key, const char *restrict valu
         if (suc) SystemSettings.comm_uart_baud = baud;
     }
 
+#if SUPPORT_NRF
     if (streq(key, "com-nrf")) {
         bool yn = cfg_bool_parse(value, &suc);
         if (suc) SystemSettings.use_comm_nordic = yn;
@@ -290,6 +293,7 @@ bool systemsettings_load_ini(const char *restrict key, const char *restrict valu
     if (streq(key, "nrf-network")) {
         cfg_hex_parse(&SystemSettings.nrf_network[0], 4, value, &suc);
     }
+#endif // SUPPORT_NRF
 
 #if 0
     if (streq(key, "com-lora")) {

platform/debug_uart.c

@@ -13,7 +13,7 @@
 
 #define DEBUG_USART_BAUD 115200
 
-#if GEX_PLAT_F072_DISCOVERY || GEX_PLAT_F072_HUB
+#if GEX_PLAT_F072_DISCOVERY || GEX_PLAT_F072_HUB || GEX_PLAT_F072_ZERO
 
     #define DEBUG_USART USART1
     #define DEBUG_USART_RSC R_USART1

platform/irq_dispatcher.c

@@ -246,7 +246,12 @@ void* irqd_detach(void *periph, IrqCallback callback)
 
         return oldArg;
     } else {
+        // catch bugs, but ignore an attempt to unbind when not bound
+        if (slot->callback != NULL) {
             trap("Detach IRQ %p() from %p but %p() bound instead", callback, periph, slot->callback);
+        } else {
+            return NULL; // the arg - none
+        }
     }
 }
 

platform/plat_compat.h

@@ -72,6 +72,8 @@
 // PLAT_NO_AFNUM - legacy platform without numbered AF alternatives
 // PLAT_FULL_XTAL - use two-wire xtal attachment
 
+// SUPPORT_NRF
+
 #if defined(GEX_PLAT_F103_BLUEPILL)
 
     // platform name for the version string
@@ -189,6 +191,23 @@
         // Status LED config
         #define STATUS_LED_PORT 'A'
         #define STATUS_LED_PIN  15 // RED LED "UP"
+    #elif defined(GEX_PLAT_F072_ZERO)
+        // platform name for the version string
+        #define GEX_PLATFORM "STM32F072-ZERO"
+
+        #define PLAT_FULL_XTAL 1
+
+        // Lock jumper config
+        #define LOCK_JUMPER_PORT 'D'
+        #define LOCK_JUMPER_PIN  2
+        #define PLAT_LOCK_BTN 1 // toggle button instead of a jumper
+        #define PLAT_LOCK_1CLOSED 1 // toggle button active in log. 1
+
+        // Status LED config
+        #define STATUS_LED_PORT 'A'
+        #define STATUS_LED_PIN  15 // RED LED "UP"
+
+        #define SUPPORT_NRF 1
     #else
         #error Bad platform
     #endif

platform/platform.c

@@ -27,9 +27,11 @@
 
 void plat_init_resources(void)
 {
+    // we use |= here, even though return values are not booleans - success is 0,
+    // thus any problem results in nonzero and the assert will trip.
     uint32_t rv = 0;
 
-    // enable clock for units we use
+    // periphs available everywhere - enable clock
     hw_periph_clock_enable(DMA1);
 #ifdef DMA2
     hw_periph_clock_enable(DMA2);
@@ -142,6 +144,12 @@ void plat_init_resources(void)
         // USB
         rv |= rsc_claim(&UNIT_SYSTEM, R_PA11);
         rv |= rsc_claim(&UNIT_SYSTEM, R_PA12);
+
+        #if defined(GEX_PLAT_F072_ZERO)
+            // unconnected pins
+            rv |= rsc_claim_range(&UNIT_PLATFORM, R_PC0, R_PC1);
+            rv |= rsc_claim_range(&UNIT_PLATFORM, R_PC4, R_PC9);
+        #endif
     }
 #elif defined(GEX_PLAT_F303_DISCOVERY)
     // Platform STM32F303VCT