Add application skeleton for st7789_lcd app

.vscode/tasks.json

@@ -8,7 +8,8 @@
             // "PLATFORM": "posix",
             // "APPLICATION": "blinky",
             // "APPLICATION": "button",
-            "APPLICATION": "spi",
+            // "APPLICATION": "spi",
+            "APPLICATION": "st7789_lcd",
         },
     },
     "tasks": [

config/build/nrf52/st7789_lcd/Makefile.st7789_lcd

@@ -0,0 +1,56 @@
+CPU = cortex-m4
+CROSS_COMPILE ?= arm-none-eabi-
+
+NRF_PATH := nrf5sdk/
+INCLUDES += $(NRF_PATH)components/
+INCLUDES += $(NRF_PATH)modules/nrfx/mdk/
+INCLUDES += $(NRF_PATH)components/libraries/strerror/
+INCLUDES += $(NRF_PATH)components/softdevice/s132/headers/nrf52/
+INCLUDES += $(NRF_PATH)components/toolchain/cmsis/include/
+INCLUDES += $(NRF_PATH)components/libraries/util/
+INCLUDES += $(NRF_PATH)components/libraries/balloc/
+INCLUDES += $(NRF_PATH)components/libraries/ringbuf/
+INCLUDES += $(NRF_PATH)modules/nrfx/hal/
+INCLUDES += $(NRF_PATH)components/libraries/bsp/
+INCLUDES += $(NRF_PATH)components/libraries/log/
+INCLUDES += $(NRF_PATH)modules/nrfx/
+INCLUDES += $(NRF_PATH)modules/nrfx/drivers/include/
+INCLUDES += $(NRF_PATH)components/libraries/experimental_section_vars/
+INCLUDES += $(NRF_PATH)components/softdevice/s132/headers/
+INCLUDES += $(NRF_PATH)components/libraries/delay/
+INCLUDES += $(NRF_PATH)integration/nrfx/
+INCLUDES += $(NRF_PATH)integration/nrfx/legacy/
+INCLUDES += $(NRF_PATH)components/libraries/atomic/
+INCLUDES += $(NRF_PATH)components/boards/
+INCLUDES += $(NRF_PATH)components/libraries/memobj/
+INCLUDES += $(NRF_PATH)components/softdevice/common/
+INCLUDES += $(NRF_PATH)external/fprintf/
+INCLUDES += $(NRF_PATH)components/libraries/log/src/
+
+NRF_C_SRCS += $(NRF_PATH)components/boards/boards.c
+NRF_C_SRCS += $(NRF_PATH)modules/nrfx/mdk/system_nrf52.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/util/app_error.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/util/app_error_handler_gcc.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/util/app_error_weak.c
+NRF_C_SRCS += $(NRF_PATH)modules/nrfx/drivers/src/nrfx_spim.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/log/src/nrf_log_frontend.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/atomic/nrf_atomic.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/log/src/nrf_log_default_backends.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/log/src/nrf_log_backend_uart.c
+NRF_C_SRCS += $(NRF_PATH)integration/nrfx/legacy/nrf_drv_uart.c
+NRF_C_SRCS += $(NRF_PATH)integration/nrfx/legacy/nrf_drv_spi.c
+NRF_C_SRCS += $(NRF_PATH)modules/nrfx/drivers/src/nrfx_uarte.c
+NRF_C_SRCS += $(NRF_PATH)modules/nrfx/drivers/src/prs/nrfx_prs.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/util/app_util_platform.c
+NRF_C_SRCS += $(NRF_PATH)modules/nrfx/drivers/src/nrfx_uart.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/log/src/nrf_log_backend_serial.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/memobj/nrf_memobj.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/balloc/nrf_balloc.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/log/src/nrf_log_str_formatter.c
+NRF_C_SRCS += $(NRF_PATH)external/fprintf/nrf_fprintf.c
+NRF_C_SRCS += $(NRF_PATH)external/fprintf/nrf_fprintf_format.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/ringbuf/nrf_ringbuf.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/strerror/nrf_strerror.c
+
+
+include config/build/$(PLATFORM)/Makefile.$(PLATFORM)

config/build/nrf52/st7789_lcd/linker.ld

@@ -0,0 +1,64 @@
+/* Linker script to configure memory regions. */
+
+SEARCH_DIR(.)
+GROUP(-lgcc -lc -lnosys)
+
+MEMORY
+{
+  FLASH (rx) : ORIGIN = 0x0, LENGTH = 0x80000
+  RAM (rwx) :  ORIGIN = 0x20000000, LENGTH = 0x10000
+}
+
+SECTIONS
+{
+}
+
+SECTIONS
+{
+  . = ALIGN(4);
+  .mem_section_dummy_ram :
+  {
+  }
+  .log_dynamic_data :
+  {
+    PROVIDE(__start_log_dynamic_data = .);
+    KEEP(*(SORT(.log_dynamic_data*)))
+    PROVIDE(__stop_log_dynamic_data = .);
+  } > RAM
+  .log_filter_data :
+  {
+    PROVIDE(__start_log_filter_data = .);
+    KEEP(*(SORT(.log_filter_data*)))
+    PROVIDE(__stop_log_filter_data = .);
+  } > RAM
+
+} INSERT AFTER .data;
+
+SECTIONS
+{
+  .mem_section_dummy_rom :
+  {
+  }
+  .log_const_data :
+  {
+    PROVIDE(__start_log_const_data = .);
+    KEEP(*(SORT(.log_const_data*)))
+    PROVIDE(__stop_log_const_data = .);
+  } > FLASH
+  .log_backends :
+  {
+    PROVIDE(__start_log_backends = .);
+    KEEP(*(SORT(.log_backends*)))
+    PROVIDE(__stop_log_backends = .);
+  } > FLASH
+    .nrf_balloc :
+  {
+    PROVIDE(__start_nrf_balloc = .);
+    KEEP(*(.nrf_balloc))
+    PROVIDE(__stop_nrf_balloc = .);
+  } > FLASH
+
+} INSERT AFTER .text
+
+
+INCLUDE "nrf_common.ld"

include/platform/nrf52/nrf52-dk.h

@@ -4,6 +4,7 @@
 #include "driver.h"
 
 #include "gpio.h"
+#include "spi.h"
 
 // LED 1
 const struct gpio nrf_led_1 = {
@@ -49,4 +50,17 @@ const struct driver led_4 = {
     .dev = &nrf_led_4
 };
 
+// SPI 0
+const struct spi nrf_spi_0 = {
+    .sck_pin = 2,
+    .mosi_pin = 3,
+    .miso_pin = 0xff,
+    .ss_pin = 25
+};
+const struct driver spi_0 = {
+    .name = "SPI0",
+    .fp = &spi_fp,
+    .dev = &nrf_spi_0
+};
+
 #endif

include/spi.h

@@ -0,0 +1,29 @@
+#ifndef __NRF52_SPI_H__
+#define __NRF52_SPI_H__
+
+#include <stdint.h>
+
+#include "driver.h"
+
+int spi_open(const struct driver *drv);
+int spi_close(const struct driver *drv);
+
+int spi_read(const struct driver *drv, char *buffer, unsigned int len);
+int spi_write(const struct driver *drv, const char *buffer, unsigned int len);
+
+struct spi {
+    uint8_t sck_pin;
+    uint8_t mosi_pin;
+    uint8_t miso_pin;
+    uint8_t ss_pin;
+};
+
+static const struct driver_fp spi_fp = {
+    .open = spi_open,
+    .close = spi_close,
+    .read = spi_read,
+    .write = spi_write,
+    .ioctl = NULL
+};
+
+#endif

src/application/st7789_lcd/main.c

@@ -0,0 +1,30 @@
+#include <string.h>
+
+#include "app_util_platform.h"
+#include "board.h"
+#include "app_error.h"
+
+#include "driver.h"
+#include "delay.h"
+
+const char buffer[] = "Hello world!\r\n";
+int main(void)
+{
+    unsigned int i = 0;
+    drv_open(&led_1);
+    drv_write(&led_1, "1", 1);
+    drv_open(&spi_0);
+
+    // APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
+    // NRF_LOG_DEFAULT_BACKENDS_INIT();
+
+    // NRF_LOG_INFO("SPI example started.");
+
+    while(1) {
+        drv_write(&spi_0, buffer, sizeof(buffer));
+        // NRF_LOG_FLUSH();
+        char c = (i++ % 2) + 0x30;
+        drv_write(&led_1, &c, 1);
+        delay_ms(200);
+    }
+}

src/platform/nrf52/spi.c

@@ -0,0 +1,86 @@
+#include <assert.h>
+
+#include "nrf_drv_spi.h"
+#include "nrf_log.h"
+#include "nrf_log_ctrl.h"
+#include "nrf_log_default_backends.h"
+
+#include "driver.h"
+#include "spi.h"
+
+#define SPI_INSTANCE    0
+static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE);
+static volatile bool spi_xfer_done;
+
+struct spi_object {
+    uint8_t *rx_buf;
+    uint8_t *tx_buf;
+    uint32_t rx_len;
+    uint32_t tx_len;
+};
+
+uint8_t rx_buffer[1];
+uint8_t tx_buffer[20];
+static struct spi_object spi_obj = {
+    .rx_buf = rx_buffer,
+    .tx_buf = tx_buffer,
+    .rx_len = sizeof(rx_buffer),
+    .tx_len = sizeof(tx_buffer)
+};
+
+void spi_event_handler(nrf_drv_spi_evt_t const * p_event, void * p_context)
+{
+    spi_xfer_done = true;
+    NRF_LOG_INFO("Transfer completed.");
+}
+
+int spi_open(const struct driver *drv)
+{
+    assert(NULL != drv);
+
+    struct spi *this = (struct spi *)(drv->dev);
+
+    nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
+    spi_config.ss_pin = this->ss_pin;
+    spi_config.miso_pin = this->miso_pin;
+    spi_config.mosi_pin = this->mosi_pin;
+    spi_config.sck_pin  = this->sck_pin;
+    APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));
+
+    return 0;
+}
+
+int spi_close(const struct driver *drv)
+{
+    assert(NULL != drv);
+
+    return 0;
+}
+
+int spi_read(const struct driver *drv, char *buffer, unsigned int len)
+{
+    assert((NULL != drv) && (NULL != buffer));
+
+    NRF_LOG_INFO("spi read not implemented yet.");
+
+    return 0;
+}
+
+int spi_write(const struct driver *drv, const char *buffer, unsigned int len)
+{
+    if(len > spi_obj.tx_len) {
+        NRF_LOG_ERROR("buffer too small");
+        return 0;
+    }
+    memcpy(spi_obj.tx_buf, buffer, len);
+
+    // Reset transfer done flag
+    spi_xfer_done = false;
+
+    APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, spi_obj.tx_buf, spi_obj.tx_len, spi_obj.rx_buf, spi_obj.rx_len));
+
+    while(!spi_xfer_done) {
+        __WFE();
+    }
+    return (int)len;
+}