diff options
Diffstat (limited to 'avr/debug.c')
-rw-r--r-- | avr/debug.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/avr/debug.c b/avr/debug.c new file mode 100644 index 0000000..e62869b --- /dev/null +++ b/avr/debug.c @@ -0,0 +1,227 @@ +#include "common.h" +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <avr/eeprom.h> + +#include "command.h" +#include "debug.h" + +/* + * Debugging + */ +#ifdef DEBUG + +//uint8_t eeprom_read_byte (const uint8_t *__p) + +static void print_blanks(uint_fast8_t count) +{ + while(count--) + putchar(' '); +} + +static uint8_t ram_read_byte(const uint8_t *p) +{ + return *p; +} + +void dump_mem(const uint8_t *startaddr, int len, + uint8_t (*readfkt)(const uint8_t *), char *title) +{ + uint8_t buf[16]; + uint8_t llen = 16; + uint8_t pre = (size_t) startaddr % 16; + const uint8_t *addr = (uint8_t *) ((size_t) startaddr & ~0x0f); + len += pre; + uint8_t i; + + if (title && *title) + printf_P(PSTR("%s\n"),title); + + while (len) { + if (len < 16) + llen = len; + + for (i = pre; i < llen; i++) + buf[i] = readfkt(addr + i); + + printf_P(PSTR("%04x:"), addr); + for (i = 0; i < llen; i++) { + if ((i % 8) == 0) + putchar(' '); + if (i < pre) + printf_P(PSTR(".. ")); + else + printf_P(PSTR("%.2x "), buf[i]); + } + /* fill line with whitespace for nice ASCII print */ + print_blanks(3 * (16u - i) + (16u-i)/8 + 1 + pre); + /* Print data in ASCII characters */ + for (i = pre; i < llen; i++) + printf_P(PSTR("%c"), isprint(buf[i]) ? buf[i] : '.'); + putchar('\n'); + + pre = 0; + addr += 16; + len -= llen; + } +} + +#if 0 +void dump_ram(const uint8_t *startaddr, int len, char *title) +{ + uint8_t llen = 16; + uint8_t pre = (size_t) startaddr % 16; + const uint8_t *addr = (uint8_t *) ((size_t) startaddr & ~0x0f); + len += pre; + uint8_t i; + + if (title && *title) + printf_P(PSTR("%s\n"),title); + + while (len) { + if (len < 16) + llen = len; + + printf_P(PSTR(" %.4x:"), (size_t) addr); + print_blanks(3 * pre); + for (i = pre; i < llen; i++) + printf_P(PSTR(" %.2x"), addr[i]); + print_blanks(3 * (16 - i + 1) + pre); + for (i = pre; i < llen; i++) + printf_P(PSTR("%c"), isprint(addr[i]) ? addr[i] : '.'); + putchar('\n'); + + pre = 0; + addr += 16; + len -= llen; + } +} +#endif +#if 0 +void dump_heap(void) +{ + extern unsigned int __brkval; + + dump_ram((uint8_t *) __malloc_heap_start, + __brkval - (unsigned int) __malloc_heap_start, + "=== Heap:"); +} +#endif + +#if 0 +/* TODO: combine with dump_ram() */ +void dump_eep(const uint8_t *addr, unsigned int len, + uint8_t (*readfkt)(const uint8_t *)) +{ + uint_fast8_t i; + uint8_t buf[16]; + + printf_P(PSTR("eeprom dump:")); + while (len) { + printf_P(PSTR("\n 0x%.4x:"), (unsigned int) addr); + for (i = 0; i<16; i++) + buf[i] = readfkt(addr + i); + for (i = 0; i<16; i++) + printf_P(PSTR(" %.2x"), buf[i]); + printf_P(PSTR(" ")); + for (i = 0; i<16; i++) + printf_P(PSTR("%c"), isprint(buf[i]) ? buf[i] : '.'); + + addr += 16; + len -= len > 16 ? 16 : len; + } + putchar('\n'); +} +#endif + + +/* + * EEPROM Display + * md addr {len} + */ +int do_dump_mem(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ +// static const uint8_t *addr; +// static uint16_t length = 128; + uint8_t (*readhow)(const uint8_t *); + + (void) cmdtp; (void) flag; + + if (argc < 2) + return CMD_RET_USAGE; + + const uint8_t *addr; + uint16_t length = 128; + + if (strchr(argv[0],'r') != NULL) + readhow = ram_read_byte; + else if (strchr(argv[0],'e') != NULL) + readhow = eeprom_read_byte; + else + return CMD_RET_USAGE; + + /* Address is specified since argc > 1 */ + addr = (const uint8_t *) (size_t) strtoul(argv[1], NULL, 16); + + /* If another parameter, it is the length to display. */ + if (argc > 2) + length = (uint16_t) strtoul(argv[2], NULL, 16); + + /* Print the lines. */ + dump_mem(addr, length, readhow, NULL); + + return 0; +} + +int do_eep_cp(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + uint16_t src, dest, count; + int_fast8_t step; + + (void) cmdtp; + (void) flag; + + if (argc != 4) + return CMD_RET_USAGE; + + src = (size_t) strtoul(argv[1], NULL, 16); + dest = (size_t) strtoul(argv[2], NULL, 16); + count = (size_t) strtoul(argv[3], NULL, 16); + + if (src > E2END) { + debug("src > EEPROM size: 0x%04x\n", src); + return 1; + } + if (dest > E2END) { + debug("dest > EEPROM size: 0x%04x\n", dest); + return 1; + } + if (count > E2END+1) { + debug("count > EEPROM size: 0x%04x\n", count); + return 1; + } + if (count == 0) { + debug("Zero length ???\n"); + return 1; + } + + if (dest > src) { + src += count - 1; + dest += count - 1; + step = -1; + } else + step = 1; + + while (count-- > 0) { + uint8_t data; + data = eeprom_read_byte((uint8_t *) src); + eeprom_write_byte((uint8_t *) dest, data); + src += step; + dest += step; + + } + return 0; +} +#endif /* DEBUG */ + |