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Added fake UART driver for Linux testing.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| /** @file fake_uart.c | ||
| * | ||
| * Implements the AVR-UART API using stdio so we can | ||
| * test on a real PC. | ||
| * | ||
| * @author Jonathan Pallant <[email protected]> | ||
| * @copyright 2019 Jonathan Pallant | ||
| * @licence MIT or Apache 2.0 at your option. | ||
| */ | ||
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| /************************************************** | ||
| * Includes | ||
| ***************************************************/ | ||
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| #define _POSIX_C_SOURCE 200112L | ||
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| #include <stdio.h> | ||
| #include <stdint.h> | ||
| #include <string.h> | ||
| #include <stdio.h> | ||
| #include <termios.h> | ||
| #include <stdlib.h> | ||
| #include <time.h> | ||
| #include <fcntl.h> | ||
| #include <signal.h> | ||
| #include "fake_uart.h" | ||
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| /************************************************** | ||
| * Defines | ||
| ***************************************************/ | ||
|
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| /* None */ | ||
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| /************************************************** | ||
| * Data Types | ||
| **************************************************/ | ||
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| /* None */ | ||
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| /************************************************** | ||
| * Function Prototypes | ||
| **************************************************/ | ||
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| static void setup_console(void); | ||
| static void clean_up(void); | ||
| static void sigint_handler(int dummy); | ||
| static int kbhit(void); | ||
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| /************************************************** | ||
| * Public Data | ||
| **************************************************/ | ||
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| /* None */ | ||
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| /************************************************** | ||
| * Private Data | ||
| **************************************************/ | ||
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| static struct termios oldt; | ||
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| /************************************************** | ||
| * Public Functions | ||
| ***************************************************/ | ||
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| void uart_init(unsigned int _baud) { | ||
| setup_console(); | ||
| signal(SIGINT, sigint_handler); | ||
| atexit(clean_up); | ||
| } | ||
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| uint16_t uart_getc(void) { | ||
| if (kbhit()) { | ||
| return fgetc(stdin) & 0xFF; | ||
| } else { | ||
| return 0x0100; | ||
| } | ||
| } | ||
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| uint16_t uart_peek(void) { | ||
| if (kbhit()) { | ||
| int ch = fgetc(stdin); | ||
| ungetc(ch, stdin); | ||
| return ch & 0xFF; | ||
| } else { | ||
| return 0x0100; | ||
| } | ||
| } | ||
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| void uart_putc(uint8_t d) { | ||
| putchar(d); | ||
| } | ||
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| void uart_puts(const char* s) { | ||
| while(*s) { | ||
| putchar(*s++); | ||
| } | ||
| } | ||
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| void uart_puts_p(const char* s) { | ||
| while(*s) { | ||
| putchar(*s++); | ||
| } | ||
| } | ||
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| uint16_t uart_available(void) { | ||
| if (kbhit()) { | ||
| return 1; | ||
| } else { | ||
| return 0; | ||
| } | ||
| } | ||
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| void uart_flush(void) { | ||
| fflush(stdout); | ||
| } | ||
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| /************************************************** | ||
| * Private Functions | ||
| ***************************************************/ | ||
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| static void setup_console(void) { | ||
| // Disable echo | ||
| struct termios newt; | ||
| int fd_stdin = fileno(stdin); | ||
| tcgetattr(fd_stdin, &oldt); | ||
| newt = oldt; | ||
| newt.c_lflag &= ~(ICANON | ECHO); | ||
| tcsetattr(fd_stdin, TCSANOW, &newt); | ||
| } | ||
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| static void clean_up(void) { | ||
| int fd_stdin = fileno(stdin); | ||
| tcsetattr(fd_stdin, TCSANOW, &oldt); | ||
| printf("\e[?25h\e[0m\e[2J"); | ||
| exit(0); | ||
| } | ||
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| static void sigint_handler(int dummy) { | ||
| ungetc(0x03, stdin); | ||
| } | ||
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| /** | ||
| * @return 1 if char available, 0 otherwise | ||
| */ | ||
| static int kbhit(void) | ||
| { | ||
| struct termios oldt; | ||
| int fd_stdin = fileno(stdin); | ||
| tcgetattr(fd_stdin, &oldt); | ||
| struct termios newt = oldt; | ||
| newt.c_lflag &= ~(ICANON | ECHO); | ||
| tcsetattr(fd_stdin, TCSANOW, &newt); | ||
| int oldf = fcntl(fd_stdin, F_GETFL, 0); | ||
| fcntl(fd_stdin, F_SETFL, oldf | O_NONBLOCK); | ||
| int ch = getchar(); | ||
| tcsetattr(fd_stdin, TCSANOW, &oldt); | ||
| fcntl(fd_stdin, F_SETFL, oldf); | ||
| if(ch != EOF) | ||
| { | ||
| ungetc(ch, stdin); | ||
| return 1; | ||
| } | ||
| return 0; | ||
| } | ||
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| /************************************************** | ||
| * End of file | ||
| ***************************************************/ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| /** @file fake_uart.h | ||
| * | ||
| * Implements the avr-uart API but using stdin and stdout. | ||
| * | ||
| * @author Jonathan Pallant <[email protected]> | ||
| * @copyright 2019 Jonathan Pallant | ||
| * @licence MIT or Apache 2.0 at your option. | ||
| */ | ||
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| #define UART_FRAME_ERROR 0x0800 /**< Framing Error by UART */ | ||
| #define UART_OVERRUN_ERROR 0x0400 /**< Overrun condition by UART */ | ||
| #define UART_BUFFER_OVERFLOW 0x0200 /**< receive ringbuffer overflow */ | ||
| #define UART_NO_DATA 0x0100 /**< no receive data available */ | ||
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| #define UART_BAUD_SELECT(b, clk) (b) | ||
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| void uart_init(unsigned int baud); | ||
| uint16_t uart_getc(void); | ||
| uint16_t uart_peek(void); | ||
| void uart_putc(uint8_t d); | ||
| void uart_puts(const char* s); | ||
| void uart_puts_p(const char* s); | ||
| uint16_t uart_available(void); | ||
| void uart_flush(void); | ||
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| /************************************************** | ||
| * End of file | ||
| ***************************************************/ |
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