nrf52840_hic: Add support for nRESET pin

Author: mbrossard

source/hic_hal/nordic/nrf52840/DAP_config.h

@@ -193,9 +193,6 @@ __STATIC_INLINE void PORT_JTAG_SETUP (void) {
   ;
 }
 
-#ifdef PIN_nRESET
-#error "Reset PIN not supported"
-#endif
 
 /** Setup SWD I/O pins: SWCLK, SWDIO, and nRESET.
 Configures the DAP Hardware I/O pins for Serial Wire Debug (SWD) mode:
@@ -378,7 +375,13 @@ __STATIC_FORCEINLINE uint32_t PIN_nRESET_IN  (void) {
            - 1: release device hardware reset.
 */
 __STATIC_FORCEINLINE void     PIN_nRESET_OUT (uint32_t bit) {
-  ;
+#ifdef PIN_nRESET
+  if (bit & 0x1) {
+    gpio_set(GPIO_REG(PIN_nRESET), GPIO_IDX(PIN_nRESET));
+  } else {
+    gpio_clear(GPIO_REG(PIN_nRESET), GPIO_IDX(PIN_nRESET));
+  }
+#endif
 }
 
 ///@}

source/hic_hal/nordic/nrf52840/IO_Config.h

@@ -45,6 +45,7 @@ COMPILER_ASSERT(DAPLINK_HIC_ID == DAPLINK_HIC_ID_NRF52840);
 #define RESET_BUTTON_PULL NRF_GPIO_PIN_PULLUP
 #define PIN_SWCLK         NRF_GPIO_PIN_MAP(0, 9)  // SWDCLK (Output)
 #define PIN_SWDIO         NRF_GPIO_PIN_MAP(0, 10) // SWDIO (Input/Output)
+#define PIN_nRESET        NRF_GPIO_PIN_MAP(0, 24) // nRESET Pin
 #undef LED_RUNNING                                // Target Running LED (Output)
 #undef LED_CONNECTED                              // Connected LED (Output)
 #define LED_HID           NRF_GPIO_PIN_MAP(0, 6)  // HID LED
@@ -63,6 +64,7 @@ COMPILER_ASSERT(DAPLINK_HIC_ID == DAPLINK_HIC_ID_NRF52840);
 #define RESET_BUTTON_PULL NRF_GPIO_PIN_PULLUP
 #define PIN_SWCLK         NRF_GPIO_PIN_MAP(1, 13) // SWDCLK (Output)
 #define PIN_SWDIO         NRF_GPIO_PIN_MAP(1, 14) // SWDIO (Input/Output)
+#define PIN_nRESET        NRF_GPIO_PIN_MAP(0, 15) // nRESET Pin
 #undef LED_RUNNING                                // Target Running LED (Output)
 #undef LED_CONNECTED                              // Connected LED (Output)
 #define LED_HID           NRF_GPIO_PIN_MAP(0, 26) // HID LED

source/hic_hal/nordic/shared/nrf52/gpio.c

@@ -44,7 +44,9 @@ void gpio_init(void)
     gpio_cfg_output(GPIO_REG(LED_HID), GPIO_IDX(LED_HID));
     gpio_cfg_output(GPIO_REG(LED_MSC), GPIO_IDX(LED_MSC));
     gpio_cfg_output(GPIO_REG(LED_CDC), GPIO_IDX(LED_CDC));
-
+#ifdef PIN_nRESET
+    gpio_cfg_output(GPIO_REG(PIN_nRESET), GPIO_IDX(PIN_nRESET));
+#endif
     gpio_cfg_input(GPIO_REG(RESET_BUTTON), GPIO_IDX(RESET_BUTTON), RESET_BUTTON_PULL);
 }
 

source/hic_hal/nordic/shared/nrf52/sdk.c

@@ -33,6 +33,9 @@ COMPILER_ASSERT(GPIO_CHECK_PRESENT_NRF52840(RESET_BUTTON));
 COMPILER_ASSERT(GPIO_CHECK_PRESENT_NRF52840(LED_HID));
 COMPILER_ASSERT(GPIO_CHECK_PRESENT_NRF52840(LED_MSC));
 COMPILER_ASSERT(GPIO_CHECK_PRESENT_NRF52840(LED_CDC));
+#ifdef PIN_nRESET
+COMPILER_ASSERT(GPIO_CHECK_PRESENT_NRF52840(PIN_nRESET));
+#endif
 #else
 #ifdef NRF528XX_DYNAMIC_PIN
 uint32_t uart_tx_pin;