Modified analogin_init function to take correct value for ChannelsBank depends on ADC pin.

This commit adds ADC Bank_B feature to STm32L152RE. With this commit PB_2 pin can also work as ADC.

Summary of changes:

Impact of changes

Migration actions required

Pull request type
[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

Test results

[] No Tests required for this change (E.g docs only update)
[x] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

Signed-off-by: Affrin Pinhero <[email protected]>

Author: affrinpinhero-2356

targets/TARGET_STM/PinNamesTypes.h

@@ -82,6 +82,10 @@ extern "C" {
 #define STM_PIN_AN_CTRL_SHIFT 20
 #define STM_PIN_ANALOG_CONTROL_BIT (STM_PIN_AN_CTRL_MASK << STM_PIN_AN_CTRL_SHIFT)
 
+#define STM_PIN_AN_CHAN_BANK_B_MASK 0x01
+#define STM_PIN_AN_CHAN_BANK_B_SHIFT 22
+#define STM_PIN_ANALOG_CHAN_BANK_B_BIT (STM_PIN_AN_CHAN_BANK_B_MASK << STM_PIN_AN_CHAN_BANK_B_SHIFT)
+
 #define STM_PIN_FUNCTION(X)         (((X) >> STM_PIN_FUNCTION_SHIFT) & STM_PIN_FUNCTION_MASK)
 #define STM_PIN_OD(X)               (((X) >> STM_PIN_OD_SHIFT) & STM_PIN_OD_MASK)
 #define STM_PIN_PUPD(X)             (((X) >> STM_PIN_PUPD_SHIFT) & STM_PIN_PUPD_MASK)
@@ -90,6 +94,7 @@ extern "C" {
 #define STM_PIN_CHANNEL(X)          (((X) >> STM_PIN_CHAN_SHIFT) & STM_PIN_CHAN_MASK)
 #define STM_PIN_INVERTED(X)         (((X) >> STM_PIN_INV_SHIFT) & STM_PIN_INV_MASK)
 #define STM_PIN_ANALOG_CONTROL(X)   (((X) >> STM_PIN_AN_CTRL_SHIFT) & STM_PIN_AN_CTRL_MASK)
+#define STM_PIN_ANALOG_CHANNEL_BANK_B(X)  (((X) >> STM_PIN_AN_CHAN_BANK_B_SHIFT) & STM_PIN_AN_CHAN_BANK_B_MASK)
 
 #define STM_PIN_DEFINE(FUNC_OD, PUPD, AFNUM)  ((int)(FUNC_OD) |\
             ((STM_PIN_SPEED_MASK & STM_PIN_SPEED_MASK) << STM_PIN_SPEED_SHIFT) |\
@@ -141,6 +146,7 @@ typedef enum {
 #define STM_MODE_AF_OD               (STM_PIN_ALTERNATE | STM_PIN_OD_BITS)
 #define STM_MODE_ANALOG              (STM_PIN_ANALOG)
 #define STM_MODE_ANALOG_ADC_CONTROL  (STM_PIN_ANALOG | STM_PIN_ANALOG_CONTROL_BIT)
+#define STM_MODE_ANALOG_ADC_CHANNEL_BANK_B  (STM_PIN_ANALOG | STM_PIN_ANALOG_CHAN_BANK_B_BIT)
 
 // High nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, 6=G, 7=H)
 // Low nibble  = pin number

targets/TARGET_STM/TARGET_STM32L1/TARGET_STM32L152xE/TARGET_NUCLEO_L152RE/PeripheralPins.c

@@ -63,7 +63,7 @@ MBED_WEAK const PinMap PinMap_ADC[] = {
     {PA_7,       ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC_IN7
     {PB_0,       ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC_IN8
     {PB_1,       ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC_IN9
-    {PB_2,       ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 0, 0)}, // ADC_IN0b
+    {PB_2,       ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG_ADC_CHANNEL_BANK_B, GPIO_NOPULL, 0, 0, 0)}, // ADC_IN0b
     {PB_12,      ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 18, 0)}, // ADC_IN18
     {PB_13,      ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 19, 0)}, // ADC_IN19
     {PB_14,      ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 20, 0)}, // ADC_IN20

targets/TARGET_STM/TARGET_STM32L1/analogin_device.c

@@ -62,7 +62,6 @@ void analogin_init(analogin_t *obj, PinName pin)
     obj->handle.Init.EOCSelection          = EOC_SINGLE_CONV;               // On STM32L1xx ADC, overrun detection is enabled only if EOC selection is set to each conversion (or transfer by DMA enabled, this is not the case in this example).
     obj->handle.Init.LowPowerAutoWait      = ADC_AUTOWAIT_UNTIL_DATA_READ;  // Enable the dynamic low power Auto Delay: new conversion start only when the previous conversion (for regular group) or previous sequence (for injected group) has been treated by user software.
     obj->handle.Init.LowPowerAutoPowerOff  = ADC_AUTOPOWEROFF_IDLE_PHASE;   // Enable the auto-off mode: the ADC automatically powers-off after a conversion and automatically wakes-up when a new conversion is triggered (with startup time between trigger and start of sampling).
-    obj->handle.Init.ChannelsBank          = ADC_CHANNELS_BANK_A;
     obj->handle.Init.ContinuousConvMode    = DISABLE;                       // Continuous mode disabled to have only 1 conversion at each conversion trig
     obj->handle.Init.NbrOfConversion       = 1;                             // Parameter discarded because sequencer is disabled
     obj->handle.Init.DiscontinuousConvMode = DISABLE;                       // Parameter discarded because sequencer is disabled
@@ -71,6 +70,16 @@ void analogin_init(analogin_t *obj, PinName pin)
     obj->handle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE;
     obj->handle.Init.DMAContinuousRequests = DISABLE;
 
+#if defined ADC_CHANNELS_BANK_B
+    if (STM_PIN_ANALOG_CHANNEL_BANK_B(function)) {
+        obj->handle.Init.ChannelsBank = ADC_CHANNELS_BANK_B;
+    } else {
+        obj->handle.Init.ChannelsBank = ADC_CHANNELS_BANK_A;
+    }
+#else
+    obj->handle.Init.ChannelsBank = ADC_CHANNELS_BANK_A;
+#endif
+
     __HAL_RCC_ADC1_CLK_ENABLE();
 
     if (HAL_ADC_Init(&obj->handle) != HAL_OK) {