struct_direct_gpio for comparison

examples/struct_direct_gpio/Makefile

+all : flash
+
+TARGET:=struct_direct_gpio
+
+include ../../ch32v003fun/ch32v003fun.mk
+
+flash : cv_flash
+clean : cv_clean
+

examples/struct_direct_gpio/struct_direct_gpio.c

+// This tries to do exactly the same as direct_gpio but with structs
+
+// Could be defined here, or in the processor defines.
+#define SYSTEM_CORE_CLOCK 48000000
+
+#include "ch32v003fun.h"
+#include <stdio.h>
+
+#define APB_CLOCK SYSTEM_CORE_CLOCK
+
+uint32_t count;
+
+int main()
+{
+	SystemInit48HSI();
+
+	// Enable GPIOs
+	RCC->APB2PCENR |= RCC_APB2Periph_GPIOC;
+
+    // GPIO D0, D4 Push-Pull, D1/SWIO floating, default analog input
+	GPIOC->CFGLR_bits = (const struct CFGLR_t) {
+	// GPIO C1 Push-Pull
+		.MODE1 = GPIO_CFGLR_MODE_OUT_10MHz,
+		.CNF1 = GPIO_CFGLR_CNF_OUT_PP,
+	// GPIO C2 Push-Pull
+		.MODE2 = GPIO_CFGLR_MODE_OUT_10MHz,
+		.CNF2 = GPIO_CFGLR_CNF_OUT_PP,
+	// GPIO C4 Push-Pull
+		.MODE4 = GPIO_CFGLR_MODE_OUT_10MHz,
+		.CNF4 = GPIO_CFGLR_CNF_OUT_PP,
+	};
+
+	while(1)
+	{
+		// Use low bits of BSHR to SET output
+		GPIOC->BSHR_bits = (const struct BSHR_t) {
+			.BS1 = 1,
+		};
+		GPIOC->BSHR_bits = (const struct BSHR_t) {
+			.BS2 = 1,
+		};
+
+		// Modify the OUTDR register directly to SET output
+		GPIOC->OUTDR_bits.ODR4 = 1;
+
+		Delay_Ms( 950 );
+
+		// Use upper bits of BSHR to RESET output
+		GPIOC->BSHR_bits = (const struct BSHR_t) {
+			.BR1 = 1,
+		};
+
+		// Use BCR to RESET output
+		GPIOC->BCR_bits = (const struct BCR_t) {
+			.BR2 = 1,
+		};
+
+		// Modify the OUTDR register directly to CLEAR output
+		GPIOC->OUTDR_bits.ODR4 = 0;
+
+		Delay_Ms( 50 );
+		count++;
+	}
+}
+