Add support for RM2 with STM32F (429, 746)

mongoose.c

@@ -19795,7 +19795,7 @@ static size_t cmsis_rx(void *buf, size_t buflen, struct mg_tcpip_if *ifp) {
 static struct mg_tcpip_if *s_ifp;
 static bool s_link, s_auth, s_join;
 
-static bool cyw_init(struct mg_tcpip_driver_cyw_firmware *fw, uint8_t *mac);
+static bool cyw_init(uint8_t *mac);
 static void cyw_poll(void);
 
 static bool mg_tcpip_driver_cyw_init(struct mg_tcpip_if *ifp) {
@@ -19807,7 +19807,7 @@ static bool mg_tcpip_driver_cyw_init(struct mg_tcpip_if *ifp) {
   }
   s_ifp = ifp;
   s_link = s_auth = s_join = false;
-  if (!cyw_init(d->fw, ifp->mac)) return false;
+  if (!cyw_init(ifp->mac)) return false;
 
   if (d->apmode) {
     MG_DEBUG(("Starting AP '%s' (%u)", d->apssid, d->apchannel));
@@ -20511,7 +20511,7 @@ static const uint32_t country_code = 'X' + ('X' << 8) + (0 << 16);
 static bool cyw_spi_init();
 
 // clang-format off
-static bool cyw_init(struct mg_tcpip_driver_cyw_firmware *fw, uint8_t *mac) {
+static bool cyw_init(uint8_t *mac) {
   uint32_t val = 0;
   if (!cyw_spi_init()) return false; // BUS DEPENDENCY
   // BT-ENABLED DEPENDENCY
@@ -20798,12 +20798,13 @@ static bool cyw_spi_init() {
   if (times == ~0) return false;
   // DS 4.2.3 Table 6. Chip starts in 16-bit little-endian mode.
   // Configure SPI and switch to 32-bit big-endian mode:
-  // - High-speed mode
+  // - High-speed mode: d->hs true
   // - IRQ POLARITY high
   // - SPI RESPONSE DELAY 4 bytes time [not in DS] TODO(scaprile): logic ana
   // - Status not sent after command, IRQ with status
-  val = sw16_2(0x000204b3); // 4 reg content
+  val = sw16_2(0x000204a3 | (d->hs ? MG_BIT(4) : 0)); // 4 reg content
   cyw_spi_write(CYW_SD_FUNC_BUS | CYW_SD_16bMODE, CYW_BUS_SPI_BUSCTRL, &val, sizeof(val));
+  mg_tcpip_call(s_ifp, MG_TCPIP_EV_DRIVER, NULL);
   cyw_spi_read(CYW_SD_FUNC_BUS, CYW_BUS_SPI_TEST, &val, sizeof(val));
   if (val != 0xFEEDBEAD) return false;
   val = 4; cyw_spi_write(CYW_SD_FUNC_BUS, CYW_BUS_SPI_RESPDLY_F1, &val, 1);

mongoose.h

@@ -2807,6 +2807,7 @@ enum {
   MG_TCPIP_EV_WIFI_SCAN_RESULT, // Wi-Fi scan results             struct mg_wifi_scan_bss_data *
   MG_TCPIP_EV_WIFI_SCAN_END,    // Wi-Fi scan has finished        NULL
   MG_TCPIP_EV_WIFI_CONNECT_ERR, // Wi-Fi connect has failed       driver and chip specific
+  MG_TCPIP_EV_DRIVER,           // Driver event                   driver specific
   MG_TCPIP_EV_USER              // Starting ID for user events
 };
 
@@ -2974,11 +2975,11 @@ struct mg_tcpip_spi_ {
 };
 
 struct mg_tcpip_driver_cyw_firmware {
-  const uint8_t * code_addr;
+  const uint8_t *code_addr;
   size_t code_len;
-  const uint8_t * nvram_addr;
+  const uint8_t *nvram_addr;
   size_t nvram_len;
-  const uint8_t * clm_addr;
+  const uint8_t *clm_addr;
   size_t clm_len;
 };
 
@@ -2993,6 +2994,7 @@ struct mg_tcpip_driver_cyw_data {
   uint8_t apsecurity; // TBD
   uint8_t apchannel;
   bool apmode;      // start in AP mode; 'false' starts connection to 'ssid' if not NULL
+  bool hs;          // use chip "high-speed" mode; otherwise SPI CPOL0 CPHA0 (DS 4.2.3 Table 6)
 };
 
 //#define MG_TCPIP_DRIVER_INIT(mgr)                                 \

src/drivers/cyw.c

@@ -7,7 +7,7 @@
 static struct mg_tcpip_if *s_ifp;
 static bool s_link, s_auth, s_join;
 
-static bool cyw_init(struct mg_tcpip_driver_cyw_firmware *fw, uint8_t *mac);
+static bool cyw_init(uint8_t *mac);
 static void cyw_poll(void);
 
 static bool mg_tcpip_driver_cyw_init(struct mg_tcpip_if *ifp) {
@@ -19,7 +19,7 @@ static bool mg_tcpip_driver_cyw_init(struct mg_tcpip_if *ifp) {
   }
   s_ifp = ifp;
   s_link = s_auth = s_join = false;
-  if (!cyw_init(d->fw, ifp->mac)) return false;
+  if (!cyw_init(ifp->mac)) return false;
 
   if (d->apmode) {
     MG_DEBUG(("Starting AP '%s' (%u)", d->apssid, d->apchannel));
@@ -723,7 +723,7 @@ static const uint32_t country_code = 'X' + ('X' << 8) + (0 << 16);
 static bool cyw_spi_init();
 
 // clang-format off
-static bool cyw_init(struct mg_tcpip_driver_cyw_firmware *fw, uint8_t *mac) {
+static bool cyw_init(uint8_t *mac) {
   uint32_t val = 0;
   if (!cyw_spi_init()) return false; // BUS DEPENDENCY
   // BT-ENABLED DEPENDENCY
@@ -1010,12 +1010,13 @@ static bool cyw_spi_init() {
   if (times == ~0) return false;
   // DS 4.2.3 Table 6. Chip starts in 16-bit little-endian mode.
   // Configure SPI and switch to 32-bit big-endian mode:
-  // - High-speed mode
+  // - High-speed mode: d->hs true
   // - IRQ POLARITY high
   // - SPI RESPONSE DELAY 4 bytes time [not in DS] TODO(scaprile): logic ana
   // - Status not sent after command, IRQ with status
-  val = sw16_2(0x000204b3); // 4 reg content
+  val = sw16_2(0x000204a3 | (d->hs ? MG_BIT(4) : 0)); // 4 reg content
   cyw_spi_write(CYW_SD_FUNC_BUS | CYW_SD_16bMODE, CYW_BUS_SPI_BUSCTRL, &val, sizeof(val));
+  mg_tcpip_call(s_ifp, MG_TCPIP_EV_DRIVER, NULL);
   cyw_spi_read(CYW_SD_FUNC_BUS, CYW_BUS_SPI_TEST, &val, sizeof(val));
   if (val != 0xFEEDBEAD) return false;
   val = 4; cyw_spi_write(CYW_SD_FUNC_BUS, CYW_BUS_SPI_RESPDLY_F1, &val, 1);

src/drivers/cyw.h

@@ -11,11 +11,11 @@ struct mg_tcpip_spi_ {
 };
 
 struct mg_tcpip_driver_cyw_firmware {
-  const uint8_t * code_addr;
+  const uint8_t *code_addr;
   size_t code_len;
-  const uint8_t * nvram_addr;
+  const uint8_t *nvram_addr;
   size_t nvram_len;
-  const uint8_t * clm_addr;
+  const uint8_t *clm_addr;
   size_t clm_len;
 };
 
@@ -30,6 +30,7 @@ struct mg_tcpip_driver_cyw_data {
   uint8_t apsecurity; // TBD
   uint8_t apchannel;
   bool apmode;      // start in AP mode; 'false' starts connection to 'ssid' if not NULL
+  bool hs;          // use chip "high-speed" mode; otherwise SPI CPOL0 CPHA0 (DS 4.2.3 Table 6)
 };
 
 //#define MG_TCPIP_DRIVER_INIT(mgr)                                 \

src/net_builtin.h

@@ -26,6 +26,7 @@ enum {
   MG_TCPIP_EV_WIFI_SCAN_RESULT, // Wi-Fi scan results             struct mg_wifi_scan_bss_data *
   MG_TCPIP_EV_WIFI_SCAN_END,    // Wi-Fi scan has finished        NULL
   MG_TCPIP_EV_WIFI_CONNECT_ERR, // Wi-Fi connect has failed       driver and chip specific
+  MG_TCPIP_EV_DRIVER,           // Driver event                   driver specific
   MG_TCPIP_EV_USER              // Starting ID for user events
 };
 

tutorials/pico-sdk/rm2-pico-picosdk-baremetal-builtin/main.c

@@ -112,7 +112,7 @@ static void mif_fn(struct mg_tcpip_if *ifp, int ev, void *ev_data) {
 
 
 static struct mg_tcpip_driver_cyw_data d = {
-  (struct mg_tcpip_spi_ *)&spi, (struct mg_tcpip_driver_cyw_firmware *)&fw, WIFI_SSID, WIFI_PASS, "mongoose", "mongoose", 0, 0, 10, true};
+  (struct mg_tcpip_spi_ *)&spi, (struct mg_tcpip_driver_cyw_firmware *)&fw, WIFI_SSID, WIFI_PASS, "mongoose", "mongoose", 0, 0, 10, true, true};
 
 int main(void) {
   // initialize stdio

tutorials/stm32/rm2-nucleo-f429zi-make-baremetal-builtin/Makefile

@@ -0,0 +1,41 @@
+CFLAGS  = -W -Wall -Wextra -Werror -Wundef -Wshadow -Wdouble-promotion
+CFLAGS += -Wformat-truncation -fno-common -Wconversion -Wno-sign-conversion
+CFLAGS += -g3 -Os -ffunction-sections -fdata-sections
+CFLAGS += -I. -Icmsis_core/CMSIS/Core/Include -Icmsis_mcu/Include
+CFLAGS += -mcpu=cortex-m4 -mthumb -mfloat-abi=hard -mfpu=fpv4-sp-d16 $(CFLAGS_EXTRA)
+LDFLAGS ?= -Tlink.ld -nostdlib -nostartfiles --specs nano.specs -lc -lgcc -Wl,--gc-sections -Wl,[email protected]
+
+SOURCES = main.c syscalls.c sysinit.c
+SOURCES += cmsis_mcu/Source/Templates/gcc/startup_stm32f429xx.s # ST startup file. Compiler-dependent!
+
+CFLAGS += -Wno-comment
+
+# Mongoose options are defined in mongoose_config.h
+SOURCES += mongoose.c 
+
+RM = rm -rf
+ifeq ($(OS),Windows_NT)
+  RM = cmd /C del /Q /F /S
+endif
+
+all build example: firmware.bin
+
+firmware.bin: firmware.elf
+	arm-none-eabi-objcopy -O binary $< $@
+
+firmware.elf: cmsis_core cmsis_mcu pico-sdk $(SOURCES) hal.h link.ld Makefile
+	arm-none-eabi-gcc $(SOURCES) $(CFLAGS) $(LDFLAGS) -o $@
+
+flash: firmware.bin
+	st-flash --reset write $< 0x8000000
+
+cmsis_core:     # ARM CMSIS core headers
+	git clone --depth 1 -b 5.9.0 https://github.com/ARM-software/CMSIS_5 $@
+cmsis_mcu:      # Keil CMSIS headers and drivers for STM32F4 series (CMSIS-pack)
+	git clone --depth 1 -b v2.6.9 https://github.com/STMicroelectronics/cmsis_device_f4 $@
+
+pico-sdk:
+	git clone --depth 1 --no-checkout -b 2.1.0 https://github.com/raspberrypi/pico-sdk $@ && cd $@ && git sparse-checkout set lib/cyw43-driver && git checkout && git submodule update --init lib/cyw43-driver
+
+clean:
+	$(RM) firmware.* *.su cmsis_core cmsis_mcu* pico-sdk

tutorials/stm32/rm2-nucleo-f429zi-make-baremetal-builtin/README.md

@@ -0,0 +1,20 @@
+
+# RM2 with a NUCLEO-F429ZI
+
+The RM2 is a breakout containing the Wi-Fi subsection of a Raspberry Pi Pico W (or Pico 2 W), that is, a CYW43439, related circuitry, and antenna.
+
+Connect both modules as pin definitions in hal.h suggest, **keep short wires**
+
+
+| Signal  | GPIO | CN7 pin |             | RM2 pin | RM2 signal |
+|---------|------|---------|-------------|---------|------------|
+| DATAPIN | PB5  | 13      | ───┐─────── | 9       | DAT        |
+| MISOPIN | PB4  | 19      | ───┘        |         |            |
+| CLKPIN  | PB3  | 15      | ─────────── | 8       | CLK        |
+| CSPIN   | PA4  | 17      | ─────────── | 10      | CS         |
+| PWRPIN  | PC7  | 11      | ─────────── | 11      | WL ON      |
+
+| Signal  | GPIO | CN8 pin |             | RM2 pin | RM2 signal |
+|---------|------|---------|-------------|---------|------------|
+| +3V3    |      | 7       | ─────────── | 12      | 3V3        |
+| GND     |      | 11      | ─────────── | 7       | (-)        |