stm32f7nucleo: Add ADC support (#1894)

Aligned to configuration of NuttX: GPIO_ADC1_IN3
nuttx/configs/nucleo-144/src/stm32_adc.c
(nuttx-7.21-298-gc67b807f43)

More pins/channels may be configured later.

Also handle difference per processors
(this could be aligned in NuttX codebase).

Change-Id: I5407e6b9b91eaa8570713d0331f786441ce0c649
Relate-to: rzr/webthing-iotjs#3
Forwarded: #1894
IoT.js-DCO-1.0-Signed-off-by: Philippe Coval p.coval@samsung.com

Author: rzr

config/nuttx/stm32f7nucleo/nuttx.profile

@@ -1,5 +1,6 @@
 ENABLE_MODULE_IOTJS_BASIC_MODULES
 ENABLE_MODULE_IOTJS_CORE_MODULES
+ENABLE_MODULE_ADC
 ENABLE_MODULE_GPIO
 ENABLE_MODULE_PWM
 ENABLE_MODULE_STM32F7NUCLEO

src/modules/nuttx/iotjs_module_stm32f7nucleo-nuttx.c

@@ -21,6 +21,26 @@
 #include "iotjs_def.h"
 #include "modules/iotjs_module_stm32f7nucleo.h"
 
+#if ENABLE_MODULE_ADC
+static void iotjs_pin_initialize_adc(jerry_value_t jobj) {
+  unsigned int number_bit;
+
+// ADC pin name is "ADC(number)_(timer)".
+#define SET_ADC_CONSTANT(number, timer)        \
+  number_bit = (GPIO_ADC##number##_IN##timer); \
+  number_bit |= (ADC_NUMBER(number));          \
+  number_bit |= (SYSIO_TIMER_NUMBER(timer));   \
+  iotjs_jval_set_property_number(jobj, "ADC" #number "_" #timer, number_bit);
+
+#define SET_ADC_CONSTANT_NUMBER(number) SET_ADC_CONSTANT(number, 3);
+
+  SET_ADC_CONSTANT_NUMBER(1);
+
+#undef SET_ADC_CONSTANT_NUMBER
+#undef SET_ADC_CONSTANT
+}
+#endif /* ENABLE_MODULE_ADC */
+
 #if ENABLE_MODULE_GPIO
 
 static void iotjs_pin_initialize_gpio(jerry_value_t jobj) {
@@ -115,6 +135,10 @@ void iotjs_stm32f7nucleo_pin_initialize(jerry_value_t jobj) {
   jerry_value_t jpin = jerry_create_object();
   iotjs_jval_set_property_jval(jobj, "pin", jpin);
 
+#if ENABLE_MODULE_ADC
+  iotjs_pin_initialize_adc(jpin);
+#endif /* ENABLE_MODULE_ADC */
+
 #if ENABLE_MODULE_GPIO
   iotjs_pin_initialize_gpio(jpin);
 #endif /* ENABLE_MODULE_GPIO */

src/platform/nuttx/iotjs_systemio-nuttx.c

@@ -45,7 +45,11 @@ struct adc_dev_s* iotjs_adc_config_nuttx(int number, int timer, uint32_t pin) {
   stm32_configgpio(pin);
 
   uint8_t channel_list[1] = { timer };
+#if defined(TARGET_BOARD_STM32F4DIS)
   return stm32_adcinitialize(number, channel_list, 1);
+#elif defined(TARGET_BOARD_STM32F7NUCLEO)
+  return stm32_adc_initialize(number, channel_list, 1);
+#endif
 }
 
 #endif /* ENABLE_MODULE_ADC */