lpc4322 (gpio): implement gpio_set_board_power

Author: Adrian Negreanu

source/hic_hal/nxp/lpc4322/DAP_config.h

@@ -158,8 +158,6 @@ typedef unsigned int    BOOL;
 // State of Reset Ouput Enable buffer
 extern bool gpio_reset_pin_is_input;
 
-
-
 //**************************************************************************************************
 /**
 \defgroup DAP_Config_PortIO_gr CMSIS-DAP Hardware I/O Pin Access

source/hic_hal/nxp/lpc4322/IO_Config.h

@@ -67,6 +67,11 @@ COMPILER_ASSERT(DAPLINK_HIC_ID == DAPLINK_HIC_ID_LPC4322);
 #define PIN_ISPCTRL_IN_BIT    11
 #define PIN_ISPCTRL           (1<<PIN_ISPCTRL_IN_BIT)
 
+// Power Enable               P3_1: GPIO5[8]
+#define PORT_POWER_EN         5
+#define PIN_POWER_EN_BIT      8
+#define PIN_POWER_EN          (1<<PIN_POWER_EN_BIT)
+
 #define X_SET(str)     LPC_GPIO_PORT->SET[PORT_##str] = PIN_##str
 #define X_CLR(str)     LPC_GPIO_PORT->CLR[PORT_##str] = PIN_##str
 #define X_DIR_OUT(str) LPC_GPIO_PORT->DIR[PORT_##str] |= (PIN_##str)

source/hic_hal/nxp/lpc4322/gpio.c

@@ -61,6 +61,7 @@ void gpio_init(void)
     scu_pinmux(2, 11, GPIO_NOPULL, FUNC0);  /* P2_11 ISPCTRL:   GPIO1[11] */
     scu_pinmux(2, 5, GPIO_PUP,    FUNC4);   /* P2_5  nRESET:    GPIO5[5]  */
     scu_pinmux(2, 6, GPIO_NOPULL, FUNC4);   /* P2_6  nRESET_OE: GPIO5[6]  */
+    scu_pinmux(3, 1, GPIO_NOPULL, FUNC4);   /* P3_1  POWER_EN:  GPIO5[8]  */
 
     /* Configure: LED as output LOW (turned off)*/
     X_DIR_OUT(LED_CONNECTED);
@@ -82,6 +83,10 @@ void gpio_init(void)
     LPC_SCU->PINTSEL0 &= ~0xff;
     LPC_SCU->PINTSEL0 |= (PORT_nRESET << 5) | (PIN_nRESET_IN_BIT);
 
+    /* Configure: POWER_EN as output LOW */
+    X_DIR_OUT(POWER_EN);
+    X_CLR(POWER_EN);
+
 #if (SWO_UART != 0)
     /* Configure: SWO as input */
     X_DIR_IN(SWO);
@@ -138,4 +143,9 @@ uint8_t gpio_get_reset_btn_fwrd(void)
 
 void gpio_set_board_power(bool powerEnabled)
 {
+    if (powerEnabled) {
+        X_SET(POWER_EN);
+    } else {
+        X_CLR(POWER_EN);
+    }
 }