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//
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// Created by MightyPork on 2017/12/15.
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//
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#include "platform.h"
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#include "framework/resources.h"
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#include "debug_uart.h"
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#include "plat_compat.h"
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#if USE_DEBUG_UART
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/** Init the submodule. */
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void DebugUart_Init(void)
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{
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// Debug UART
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bool ok = true;
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ok &= rsc_claim(&UNIT_SYSTEM, R_USART2);
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ok &= rsc_claim(&UNIT_SYSTEM, R_PA2);
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assert_param(ok);
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}
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/** Init the hardware peripheral - this is called early in the boot process */
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void DebugUart_PreInit(void)
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{
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__HAL_RCC_USART2_CLK_ENABLE();
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__HAL_RCC_GPIOA_CLK_ENABLE();
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LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_2, LL_GPIO_MODE_ALTERNATE);
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LL_GPIO_SetPinOutputType(GPIOA, LL_GPIO_PIN_2, LL_GPIO_OUTPUT_PUSHPULL);
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LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_2, LL_GPIO_SPEED_FREQ_HIGH);
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// commented out default values
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// LL_USART_ConfigAsyncMode(USART2);
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// LL_USART_SetDataWidth(USART2, LL_USART_DATAWIDTH_8B);
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// LL_USART_SetParity(USART2, LL_USART_PARITY_NONE);
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// LL_USART_SetStopBitsLength(USART2, LL_USART_STOPBITS_1);
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// LL_USART_SetHWFlowCtrl(USART2, LL_USART_HWCONTROL_NONE);
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LL_USART_EnableDirectionTx(USART2);
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#if GEX_PLAT_F072_DISCOVERY
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LL_USART_SetBaudRate(USART2, SystemCoreClock, LL_USART_OVERSAMPLING_16, 115200); // This is not great, let's hope it's like this on all platforms...
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#elif GEX_PLAT_F103_BLUEPILL
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LL_USART_SetBaudRate(USART2, SystemCoreClock/2, 115200); // This is not great, let's hope it's like this on all platforms...
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#else
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#error "BAD PLATFORM!"
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#endif
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LL_USART_Enable(USART2);
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}
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/** Debug print, used by debug / newlib */
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ssize_t _write_r(struct _reent *rptr, int fd, const void *buf, size_t len)
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{
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(void)rptr;
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uint8_t *buff = buf;
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for (uint32_t i = 0; i < len; i++) {
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while (!LL_USART_IsActiveFlag_TC(USART2));
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LL_USART_TransmitData8(USART2, *buff++);
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}
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return len;
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}
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#else
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// No-uart variant
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void DebugUart_Init(void) {}
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ssize_t _write_r(struct _reent *rptr, int fd, const void *buf, size_t len) {}
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#endif //USE_DEBUG_UART
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