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firmware: drivers: uart: Creating uart header and source files #43
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| #include <hal/include/libopencm3/stm32/rcc.h> | ||
| #include <hal/include/libopencm3/stm32/gpio.h> | ||
| #include <hal/include/libopencm3/stm32/usart.h> | ||
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| #include "uart.h" | ||
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| int uart_init(uart_config_t config) | ||
| { | ||
| uint32_t usart; | ||
| uint32_t baud; | ||
| uint32_t stopbits; | ||
| uint32_t parity; | ||
| uint32_t mode; | ||
| uint32_t bits; | ||
| uint32_t flowcontrol; | ||
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| switch(config.port) | ||
| { | ||
| case UART_PORT_1: usart = USART1_BASE break; | ||
| case UART_PORT_2: usart = USART2_BASE break; | ||
| case UART_PORT_3: usart = USART3_BASE break; | ||
| case UART_PORT_4: usart = UART4_BASE break; | ||
| case UART_PORT_5: usart = UART5_BASE break; | ||
| default: | ||
| //TODO Add error log system. | ||
| break; | ||
| } | ||
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| baud = (uint32_t) config.baud_rate; | ||
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| switch(config.stopbits) | ||
| { | ||
| case UART_SB_0_5: stopbits = USART_STOPBITS_0_5 break; | ||
| case UART_SB_1: stopbits = USART_STOPBITS_1 break; | ||
| case UART_SB_1_5: stopbits = USART_STOPBITS_1_5 break; | ||
| case USART_STOPBITS_2: stopbits = USART_STOPBITS_2 break; | ||
| default: | ||
| //TODO Add error log system. | ||
| break; | ||
| } | ||
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| switch(config.parity) | ||
| { | ||
| case UART_NO_PARITY: parity = USART_PARITY_NONE break; | ||
| case UART_ODD_PARITY: parity = USART_PARITY_ODD break; | ||
| case UART_EVEN_PARITY: parity = USART_PARITY_EVEN break; | ||
| default: | ||
| //TODO Add error log system. | ||
| break; | ||
| } | ||
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| switch(config.mode) | ||
| { | ||
| case UART_MODE_TX: mode = USART_MODE_TX break; | ||
| case UART_MODE_RX: mode = USART_MODE_RX break; | ||
| case UART_MODE_TX_RX: mode = USART_MODE_TX_RX break; | ||
| default: | ||
| //TODO Add error log system. | ||
| break; | ||
| } | ||
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| switch(config.world_length) | ||
| { | ||
| case UART_WL_8: bits = 8 break; | ||
| case UART_WL_9: bits = 9 break; | ||
| default: | ||
| //TODO Add error log system. | ||
| break; | ||
| } | ||
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| switch(config.flow_control) | ||
| { | ||
| case UART_FC_NONE: flowcontrol = USART_FLOWCONTROL_NONE break; | ||
| case UART_FC_RTS: flowcontrol = USART_FLOWCONTROL_RTS break; | ||
| case UART_FC_CTS: flowcontrol = USART_FLOWCONTROL_CTS break; | ||
| case UART_FC_RTS_CTS: flowcontrol = USART_FLOWCONTROL_RTS_CTS break; | ||
| default: | ||
| //TODO Add error log system. | ||
| break; | ||
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| } | ||
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| /* Setup UART parameters. */ | ||
| usart_set_baudrate(usart, baud); | ||
| usart_set_databits(usart, bits); | ||
| usart_set_stopbits(usart, stopbits); | ||
| usart_set_mode(usart, mode); | ||
| usart_set_parity(usart, parity); | ||
| usart_set_flow_control(usart, flowcontrol); | ||
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| /* Enable UART. */ | ||
| usart_enable(usart); | ||
| } |
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| @@ -0,0 +1,87 @@ | ||
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| #ifndef UART_H | ||
| #define UART_H | ||
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| /** | ||
| * \brief UART ports. | ||
| */ | ||
| typedef enum | ||
| { | ||
| UART_PORT_1=0, /**< UART port 1. */ | ||
| UART_PORT_2, /**< UART port 2. */ | ||
| UART_PORT_3, /**< UART port 3. */ | ||
| UART_PORT_4, /**< UART port 4. */ | ||
| UART_PORT_5 /**< UART port 5. */ | ||
| } uart_ports_e; | ||
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| /** | ||
| * \brief UART modes. | ||
| */ | ||
| typedef enum | ||
| { | ||
| UART_MODE_TX=0, | ||
| UART_MODE_RX, | ||
| UART_MODE_TX_RX | ||
| } uart_modes_e; | ||
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| /** | ||
| * \brief Parity configuration. | ||
| */ | ||
| typedef enum | ||
| { | ||
| UART_NO_PARITY=0, /**< No parity. */ | ||
| UART_ODD_PARITY, /**< Odd parity. */ | ||
| UART_EVEN_PARITY /**< Even parity. */ | ||
| } uart_parity_e; | ||
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| /** | ||
| * \brief Stop bits configuration. | ||
| */ | ||
| typedef enum | ||
| { | ||
| UART_SB_0_5=0, | ||
| UART_SB_1, | ||
| UART_SB_1.5, | ||
| UART_SB_2 | ||
| } uart_sb_e; | ||
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| /** | ||
| * \brief Word length configuration. | ||
| */ | ||
| typedef enum | ||
| { | ||
| UART_WL_8=0, | ||
| UART_WL_9 | ||
| } uart_wl_e; | ||
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| /** | ||
| * \brief Hardware Flow Control. | ||
| */ | ||
| typedef enum | ||
| { | ||
| UART_FC_NONE=0, | ||
| UART_FC_RTS, | ||
| UART_FC_CTS, | ||
| UART_FC_RTS_CTS | ||
| } uart_fc_e; | ||
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| /** | ||
| * \brief Baud rate configuration. | ||
| */ | ||
| typedef uint32_t uart_br_t; | ||
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| typedef struct | ||
| { | ||
| uart_ports_e port; | ||
| uart_modes_e mode; | ||
| uart_parity_e parity; | ||
| uart_sb_e stop_bits; | ||
| uart_wl word_length; | ||
| uart_fc_e flow_control; | ||
| uart_br_t baud_rate; | ||
| } uart_config_t; | ||
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| int uart_init(uart_config_t config); | ||
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| #endif /* UART_H */ |