diff options
| -rw-r--r-- | util/iteflash.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/util/iteflash.c b/util/iteflash.c index b13c61d6bc..472f58f515 100644 --- a/util/iteflash.c +++ b/util/iteflash.c @@ -447,10 +447,16 @@ static int config_i2c(struct ftdi_context *ftdi) } /* Special waveform definition */ -#define SPECIAL_LEN_USEC 50000ULL /* us */ -#define SPECIAL_FREQ 400000ULL +#define SPECIAL_LEN_USEC 50000ULL /* us */ +#define SPECIAL_FREQ 400000ULL + #define SPECIAL_PATTERN 0x0000020301010302ULL +#define SPECIAL_PATTERN_SDA_L_SCL_L 0x0000000000000000ULL +#define SPECIAL_PATTERN_SDA_H_SCL_L 0x0202020202020202ULL +#define SPECIAL_PATTERN_SDA_L_SCL_H 0x0101010101010101ULL +#define SPECIAL_PATTERN_SDA_H_SCL_H 0x0303030303030303ULL +#define TICK_COUNT 24 #define MSEC 1000 #define USEC 1000000 @@ -495,8 +501,23 @@ retry: goto special_failed; } + /* do usb special waveform */ + + wave[0] = 0x0; + ftdi_write_data(ftdi, (uint8_t *)wave, 1); + usleep(5000); + + /* program each special tick */ + for (i = 0; i < TICK_COUNT; ) { + wave[i++] = SPECIAL_PATTERN_SDA_L_SCL_L; + wave[i++] = SPECIAL_PATTERN_SDA_H_SCL_L; + wave[i++] = SPECIAL_PATTERN_SDA_L_SCL_L; + } + wave[19] = SPECIAL_PATTERN_SDA_H_SCL_H; + + /* fill the buffer with the waveform pattern */ - for (i = 0; i < SPECIAL_BUFFER_SIZE / sizeof(uint64_t); i++) + for (i = TICK_COUNT; i < SPECIAL_BUFFER_SIZE / sizeof(uint64_t); i++) wave[i] = SPECIAL_PATTERN; ret = ftdi_write_data(ftdi, (uint8_t *)wave, SPECIAL_BUFFER_SIZE); @@ -513,9 +534,10 @@ retry: usleep(10 * MSEC); /* if we cannot communicate, retry the sequence */ - if (check_chipid(ftdi) < 0) + if (check_chipid(ftdi) < 0) { + sleep(1); goto retry; - + } special_failed: printf("Done.\n"); free(wave); |