Implementing the remaining API specified in platform.h for MD380 target

meson.build

@@ -99,10 +99,10 @@ md380_src = src + ['openrtx/src/main.c',
                    'platform/mcu/STM32F4xx/drivers/gpio.c',
                    'platform/mcu/STM32F4xx/drivers/usb_vcom.c',
                    'platform/mcu/STM32F4xx/drivers/delays.c',
-                   'platform/mcu/STM32F4xx/drivers/gpio.c',
                    'platform/mcu/CMSIS/Device/ST/STM32F4xx/Source/system_stm32f4xx.c',
                    'platform/drivers/display/HX83XX_md380.c',
                    'platform/targets/MD380/platform.c',
+                   'platform/targets/MD380/adc1.c',
                    'openrtx/src/graphics/graphics_rgb565.c',
                    'rtos/uC-OS3/Ports/ARM-Cortex-M/ARMv7-M/os_cpu_c.c',
                    'rtos/uC-OS3/Ports/ARM-Cortex-M/ARMv7-M/os_cpu_a.s',
@@ -114,6 +114,7 @@ md380_def = def + {'STM32F40_41xxx': ''}
 md380_inc = inc + ['platform/mcu/CMSIS/Include',
                    'platform/mcu/CMSIS/Device/ST/STM32F4xx/Include',
                    'platform/mcu/STM32F4xx',
+                   'platform/mcu/STM32F4xx/drivers',
                    'platform/mcu/STM32F4xx/drivers/usb',
                    'platform/targets/MD380',
                    'rtos/uC-OS3/Ports/ARM-Cortex-M/ARMv7-M',

platform/targets/MD380/adc1.c

@@ -15,8 +15,9 @@
  *   along with this program; if not, see <http://www.gnu.org/licenses/>   *
  ***************************************************************************/
 
+#include <gpio.h>
+#include "hwconfig.h"
 #include "adc1.h"
-#include "gpio.h"
 
 uint16_t measurements[4];
 
@@ -32,10 +33,10 @@ void adc1_init()
      * - PA3: vox level
      * - PB0: RSSI level
      */
-    gpio_setMode(GPIOA, 0, INPUT_ANALOG);
-    gpio_setMode(GPIOA, 1, INPUT_ANALOG);
-    gpio_setMode(GPIOA, 3, INPUT_ANALOG);
-    gpio_setMode(GPIOB, 0, INPUT_ANALOG);
+    gpio_setMode(AIN_VOLUME, INPUT_ANALOG);
+    gpio_setMode(AIN_VBAT,   INPUT_ANALOG);
+    gpio_setMode(AIN_MIC,    INPUT_ANALOG);
+    gpio_setMode(AIN_RSSI,   INPUT_ANALOG);
 
     /*
      * ADC clock is APB2 frequency divided by 8, giving 10.5MHz.
@@ -89,7 +90,7 @@ void adc1_init()
     ADC1->CR2 |= ADC_CR2_SWSTART;
 }
 
-void adc1_shutdown()
+void adc1_terminate()
 {
     DMA2_Stream0->CR &= ~DMA_SxCR_EN;
     ADC1->CR2 &= ADC_CR2_ADON;

platform/targets/MD380/adc1.h

@@ -19,7 +19,6 @@
 #define ADC1_H
 
 #include <stdint.h>
-#include "stm32f4xx.h"
 
 /**
  * Driver for ADC1, used to continuously sample the following channels:
@@ -45,7 +44,7 @@ void adc1_init();
  * Turn off ADC1 (also gating off its clock) and disable DMA2 Stream 0.
  * DMA2 clock is kept active.
  */
-void adc1_shutdown();
+void adc1_terminate();
 
 /**
  * Get current measurement of a given channel, mapped as below:

platform/targets/MD380/hwconfig.h

@@ -20,7 +20,7 @@
 #ifndef HWCONFIG_H
 #define HWCONFIG_H
 
-#include "stm32f4xx.h"
+#include <stm32f4xx.h>
 
 /* Screen dimensions */
 #define SCREEN_WIDTH 160
@@ -43,4 +43,12 @@
 
 #define LCD_BKLIGHT GPIOC,6
 
+#define GREEN_LED  GPIOE,0
+#define RED_LED    GPIOE,1
+
+#define AIN_VOLUME GPIOA,0
+#define AIN_VBAT   GPIOA,1
+#define AIN_MIC    GPIOA,3
+#define AIN_RSSI   GPIOB,0
+
 #endif

platform/targets/MD380/platform.c

@@ -17,13 +17,24 @@
  *   along with this program; if not, see <http://www.gnu.org/licenses/>   *
  ***************************************************************************/
 
-#include <stm32f4xx.h>
-#include "platform.h"
+#include <platform.h>
+#include <gpio.h>
 #include "hwconfig.h"
-#include "gpio.h"
+#include "adc1.h"
 
 void platform_init()
 {
+    /* Configure GPIOs */
+    gpio_setMode(GREEN_LED, OUTPUT);
+    gpio_setMode(RED_LED, OUTPUT);
+
+    /* Backlight pin connected to TIM8 CR1 */
+    gpio_setMode(LCD_BKLIGHT, ALTERNATE);
+    gpio_setAlternateFunction(LCD_BKLIGHT, 3);
+
+    /* Initialise ADC1, for vbat, RSSI, ... */
+    adc1_init();
+
     /*
      * Configure TIM8 for backlight PWM: Fpwm = 100kHz, 8 bit of resolution
      * APB2 freq. is 84MHz, then: PSC = 327 to have Ftick = 256.097kHz
@@ -42,18 +53,86 @@ void platform_init()
     TIM8->CCR1 = 0;
     TIM8->EGR  = TIM_EGR_UG;        /* Update registers */
     TIM8->CR1 |= TIM_CR1_CEN;       /* Start timer */
-
-    /* Configure backlight GPIO, TIM8 is on AF3 */
-    gpio_setMode(LCD_BKLIGHT, ALTERNATE);
-    gpio_setAlternateFunction(LCD_BKLIGHT, 3);
 }
 
 void platform_terminate()
 {
-    /* Shut off backlight */
+    /* Shut down backlight */
     gpio_setMode(LCD_BKLIGHT, OUTPUT);
     gpio_clearPin(LCD_BKLIGHT);
+
+    gpio_clearPin(GREEN_LED);
+    gpio_clearPin(RED_LED);
+
+    /* Shut down timer */
     RCC->APB2ENR &= ~RCC_APB2ENR_TIM8EN;
+
+    /* Shut down ADC */
+    adc1_terminate();
+}
+
+float platform_getVbat()
+{
+    return adc1_getMeasurement(0);
+}
+
+float platform_getMicLevel()
+{
+    return adc1_getMeasurement(2);
+}
+
+float platform_getVolumeLevel()
+{
+    return adc1_getMeasurement(3);
+}
+
+uint8_t platform_getChSelector()
+{
+    return 0.0f;
+}
+
+void platform_ledOn(led_t led)
+{
+    switch(led)
+    {
+        case GREEN:
+            gpio_setPin(GREEN_LED);
+            break;
+
+        case RED:
+            gpio_setPin(RED_LED);
+            break;
+
+        default:
+            break;
+    }
+}
+
+void platform_ledOff(led_t led)
+{
+    switch(led)
+    {
+        case GREEN:
+            gpio_clearPin(GREEN_LED);
+            break;
+
+        case RED:
+            gpio_clearPin(RED_LED);
+            break;
+
+        default:
+            break;
+    }
+}
+
+void platform_beepStart(uint16_t freq)
+{
+    (void) freq;
+}
+
+void platform_beepStop()
+{
+
 }
 
 void platform_setBacklightLevel(uint8_t level)