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151 lines
4.0 KiB
151 lines
4.0 KiB
//
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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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#include "hw_utils.h"
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#include "framework/system_settings.h"
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#if USE_DEBUG_UART
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#define DEBUG_USART_BAUD 115200
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#if GEX_PLAT_F072_DISCOVERY || GEX_PLAT_F072_HUB
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#define DEBUG_USART USART1
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#define DEBUG_USART_RSC R_USART1
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#define DEBUG_USART_PORT 'A'
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#define DEBUG_USART_PIN 9
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#define DEBUG_USART_AF 1
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#define DEBUG_USART_PCLK PLAT_APB1_HZ
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#elif GEX_PLAT_F103_BLUEPILL
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#define DEBUG_USART USART2
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#define DEBUG_USART_RSC R_USART2
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#define DEBUG_USART_PORT 'A'
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#define DEBUG_USART_PIN 2
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#define DEBUG_USART_PCLK PLAT_APB1_HZ
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#elif GEX_PLAT_F303_DISCOVERY
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#define DEBUG_USART USART3
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#define DEBUG_USART_RSC R_USART3
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#define DEBUG_USART_PORT 'D'
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#define DEBUG_USART_PIN 8
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#define DEBUG_USART_AF 7
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#define DEBUG_USART_PCLK PLAT_APB1_HZ
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#elif GEX_PLAT_F407_DISCOVERY
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#define DEBUG_USART USART2
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#define DEBUG_USART_RSC R_USART2
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#define DEBUG_USART_PORT 'A'
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#define DEBUG_USART_PIN 2
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#define DEBUG_USART_AF 7
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#define DEBUG_USART_PCLK PLAT_APB1_HZ
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#else
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#error "BAD PLATFORM!"
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#endif
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static bool debug_uart_inited = false;
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static bool debug_uart_preinited = false;
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/** Init the submodule. */
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void DebugUart_Init(void)
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{
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if (debug_uart_inited) return;
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if (!debug_uart_preinited) DebugUart_PreInit();
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// Debug UART
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assert_param(E_SUCCESS == rsc_claim(&UNIT_SYSTEM, DEBUG_USART_RSC));
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assert_param(E_SUCCESS == rsc_claim_pin(&UNIT_SYSTEM, DEBUG_USART_PORT, DEBUG_USART_PIN));
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debug_uart_inited = true;
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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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debug_uart_preinited = true;
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// configure AF only if platform uses AF numbers
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#if !PLAT_NO_AFNUM
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-result"
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(void) hw_configure_gpio_af(DEBUG_USART_PORT, DEBUG_USART_PIN, DEBUG_USART_AF);
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#pragma GCC diagnostic pop
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#endif
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hw_periph_clock_enable(DEBUG_USART);
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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(DEBUG_USART);
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LL_USART_SetBaudRate(DEBUG_USART, DEBUG_USART_PCLK, LL_USART_OVERSAMPLING_16, DEBUG_USART_BAUD);
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LL_USART_Enable(DEBUG_USART);
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}
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void DebugUart_Teardown(void)
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{
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if (!debug_uart_inited) return;
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dbg("Disabling debug UART!");
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// TODO wait for Tx (after debug print DMA is implemented)
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LL_USART_Disable(DEBUG_USART);
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rsc_free(&UNIT_SYSTEM, DEBUG_USART_RSC);
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hw_periph_clock_disable(DEBUG_USART);
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bool suc = true;
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Resource r = rsc_portpin2rsc(DEBUG_USART_PORT, DEBUG_USART_PIN, &suc);
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rsc_free(&UNIT_SYSTEM, r);
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hw_deinit_pin_rsc(r);
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debug_uart_preinited = false;
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debug_uart_inited = false;
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assert_param(suc);
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}
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void debug_write(const char *buf, uint16_t len)
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{
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if (!SystemSettings.enable_debug_uart) return;
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// TODO wait for DMA complete
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// TODO use DMA
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for (uint16_t i = 0; i < len; i++) {
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while (!LL_USART_IsActiveFlag_TC(DEBUG_USART));
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LL_USART_TransmitData8(DEBUG_USART, (uint8_t) *buf++);
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}
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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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trap("Use of newlib printf");
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}
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#else
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// No-uart variant
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void DebugUart_PreInit(void) {}
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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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return len;
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}
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#endif //USE_DEBUG_UART
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