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Diffstat (limited to 'src/sample/io_sample/UART/Polling/main.c')
| -rw-r--r-- | src/sample/io_sample/UART/Polling/main.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/src/sample/io_sample/UART/Polling/main.c b/src/sample/io_sample/UART/Polling/main.c new file mode 100644 index 0000000..abc03d4 --- /dev/null +++ b/src/sample/io_sample/UART/Polling/main.c @@ -0,0 +1,213 @@ +/** +********************************************************************************************************* +* Copyright(c) 2018, Realtek Semiconductor Corporation. All rights reserved. +********************************************************************************************************** +* @file main.c +* @brief uart demo polling tx and rx. +* @details +* @author yuan +* @date 2018-06-28 +* @version v0.1 +********************************************************************************************************* +*/ + +/* Includes ------------------------------------------------------------------*/ +#include <stdlib.h> +#include <string.h> +#include "rtl876x_nvic.h" +#include "rtl876x_pinmux.h" +#include "rtl876x_rcc.h" +#include "rtl876x_uart.h" +#include "trace.h" + +/* Defines ------------------------------------------------------------------*/ +#define UART_TX_PIN P3_0 +#define UART_RX_PIN P3_1 + + +/** @brief UART_BaudRate_Table + * div ovsr ovsr_adj :These three parameters set the baud rate calibration parameters of UART. + baudrate | div | ovsr | ovsr_adj +-------------------------------------------------------- + 1200Hz | 2400 | 8 | 0x3EF + 2400Hz | 1200 | 8 | 0x3EF + 4800Hz | 600 | 8 | 0x3EF + 9600Hz | 300 | 8 | 0x3EF + 14400Hz | 250 | 6 | 0x010 + 19200Hz | 150 | 8 | 0x3EF + 28800Hz | 125 | 6 | 0x010 + 38400Hz | 75 | 8 | 0x3EF + 57600Hz | 50 | 8 | 0x3EF + 76800Hz | 43 | 7 | 0x010 + 115200Hz | 20 | 12 | 0x252 + 128000Hz | 19 | 11 | 0x2AA + 153600Hz | 17 | 10 | 0x292 + 230400Hz | 11 | 10 | 0x3BB + 460800Hz | 6 | 9 | 0x0AA + 500000Hz | 8 | 5 | 0 + 921600Hz | 3 | 9 | 0x0AA + 1000000Hz | 4 | 5 | 0 + 1382400Hz | 2 | 9 | 0x0AA + 1444400Hz | 2 | 8 | 0x3F7 + 1500000Hz | 2 | 8 | 0x292 + 2000000Hz | 2 | 5 | 0 + 3000000Hz | 1 | 8 | 0x292 +----------------------------------------------------- +*/ /* End of UART_BaudRate_Table */ + +/* Globals ------------------------------------------------------------------*/ +typedef struct +{ + uint16_t div; + uint16_t ovsr; + uint16_t ovsr_adj; +} UART_BaudRate_TypeDef; + +typedef enum +{ + BAUD_RATE_9600, + BAUD_RATE_19200, + BAUD_RATE_115200, + BAUD_RATE_230400, + BAUD_RATE_256000, + BAUD_RATE_384000, + BAUD_RATE_460800, + BAUD_RATE_921600, + BAUD_RATE_1000000, + BAUD_RATE_2000000, + BAUD_RATE_3000000 +} UartBaudRate_TypeDef; + +const UART_BaudRate_TypeDef BaudRate_Table[11] = +{ + {271, 10, 0x24A}, // BAUD_RATE_9600 + {150, 8, 0x3EF}, // BAUD_RATE_19200 + {20, 12, 0x252}, // BAUD_RATE_115200 + {11, 10, 0x3BB}, // BAUD_RATE_230400 + {11, 9, 0x084}, // BAUD_RATE_256000 + {7, 9, 0x3EF}, // BAUD_RATE_384000 + {6, 9, 0x0AA}, // BAUD_RATE_460800 + {3, 9, 0x0AA}, // BAUD_RATE_921600 + {4, 5, 0}, // BAUD_RATE_1000000 + {2, 5, 0}, // BAUD_RATE_2000000 + {1, 8, 0x292}, // BAUD_RATE_3000000 +}; + +uint8_t String_Buf[100]; + +/** + * @brief Initialization of pinmux settings and pad settings. + * @param No parameter. + * @return void +*/ +void board_uart_init(void) +{ + Pad_Config(UART_TX_PIN, PAD_PINMUX_MODE, PAD_IS_PWRON, PAD_PULL_UP, PAD_OUT_DISABLE, PAD_OUT_HIGH); + Pad_Config(UART_RX_PIN, PAD_PINMUX_MODE, PAD_IS_PWRON, PAD_PULL_UP, PAD_OUT_DISABLE, PAD_OUT_HIGH); + + Pinmux_Config(UART_TX_PIN, UART0_TX); + Pinmux_Config(UART_RX_PIN, UART0_RX); +} + +/** + * @brief Initialize uart peripheral. + * @param No parameter. + * @return void +*/ +void driver_uart_init(void) +{ + UART_DeInit(UART0); + + RCC_PeriphClockCmd(APBPeriph_UART0, APBPeriph_UART0_CLOCK, ENABLE); + + /* uart init */ + UART_InitTypeDef UART_InitStruct; + UART_StructInit(&UART_InitStruct); + + /* Config uart baudrate */ + UART_InitStruct.UART_Div = BaudRate_Table[BAUD_RATE_115200].div; + UART_InitStruct.UART_Ovsr = BaudRate_Table[BAUD_RATE_115200].ovsr; + UART_InitStruct.UART_OvsrAdj = BaudRate_Table[BAUD_RATE_115200].ovsr_adj; + + UART_Init(UART0, &UART_InitStruct); +} + +/** + * @brief UARt send data continuous. + * @param No parameter. + * @return void +*/ +void uart_senddata_continuous(UART_TypeDef *UARTx, const uint8_t *pSend_Buf, uint16_t vCount) +{ + uint8_t count; + + while (vCount / UART_TX_FIFO_SIZE > 0) + { + while (UART_GetFlagStatus(UARTx, UART_FLAG_TX_FIFO_EMPTY) == 0); + for (count = UART_TX_FIFO_SIZE; count > 0; count--) + { + UARTx->RB_THR = *pSend_Buf++; + } + vCount -= UART_TX_FIFO_SIZE; + } + + while (UART_GetFlagStatus(UARTx, UART_FLAG_TX_FIFO_EMPTY) == 0); + while (vCount--) + { + UARTx->RB_THR = *pSend_Buf++; + } +} + +/** + * @brief Demo code of uart. + * @param No parameter. + * @return void +*/ +void uart_demo(void) +{ + uint16_t demo_str_len = 0; + uint8_t rx_byte = 0; + + board_uart_init(); + driver_uart_init(); + + char *demo_str = "### Uart demo polling read uart data ###\r\n"; + demo_str_len = strlen(demo_str); + memcpy(String_Buf, demo_str, demo_str_len); + + /* Send demo tips */ + uart_senddata_continuous(UART0, String_Buf, demo_str_len); + + /* Loop rx and tx */ + while (1) + { + if (UART_GetFlagStatus(UART0, UART_FLAG_RX_DATA_AVA) == SET) + { + rx_byte = UART_ReceiveByte(UART0); + UART_SendByte(UART0, rx_byte); + } + } +} + +/** + * @brief Entry of app code + * @return int (To avoid compile warning) + */ +int main(void) +{ + extern uint32_t random_seed_value; + srand(random_seed_value); + uart_demo(); + + while (1) + { + __nop(); + __nop(); + __nop(); + __nop(); + __nop(); + __nop(); + } +} + +/******************* (C) COPYRIGHT 2018 Realtek Semiconductor Corporation *****END OF FILE****/ |