diff options
Diffstat (limited to 'libjaylink/jtag.c')
-rw-r--r-- | libjaylink/jtag.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/libjaylink/jtag.c b/libjaylink/jtag.c index 7080c97..d51a7c6 100644 --- a/libjaylink/jtag.c +++ b/libjaylink/jtag.c @@ -34,6 +34,8 @@ #define CMD_JTAG_IO_V3 0xcf #define CMD_JTAG_CLEAR_TRST 0xde #define CMD_JTAG_SET_TRST 0xdf +#define CMD_JTAG_CLEAR_TMS 0xc9 +#define CMD_JTAG_SET_TMS 0xca /** * Error code indicating that there is not enough free memory on the device to @@ -257,3 +259,91 @@ JAYLINK_API int jaylink_jtag_set_trst(struct jaylink_device_handle *devh) return JAYLINK_OK; } + +/** + * Clear the JTAG test mode select (TMS) signal. + * + * @param[in,out] devh Device handle. + * + * @retval JAYLINK_OK Success. + * @retval JAYLINK_ERR_ARG Invalid arguments. + * @retval JAYLINK_ERR_TIMEOUT A timeout occurred. + * @retval JAYLINK_ERR_IO Input/output error. + * @retval JAYLINK_ERR Other error conditions. + * + * @since 0.3.0 + */ +JAYLINK_API int jaylink_jtag_clear_tms(struct jaylink_device_handle *devh) +{ + int ret; + struct jaylink_context *ctx; + uint8_t buf[1]; + + if (!devh) + return JAYLINK_ERR_ARG; + + ctx = devh->dev->ctx; + ret = transport_start_write(devh, 1, true); + + if (ret != JAYLINK_OK) { + log_err(ctx, "transport_start_write() failed: %s", + jaylink_strerror(ret)); + return ret; + } + + buf[0] = CMD_JTAG_CLEAR_TMS; + + ret = transport_write(devh, buf, 1); + + if (ret != JAYLINK_OK) { + log_err(ctx, "transport_write() failed: %s", + jaylink_strerror(ret)); + return ret; + } + + return JAYLINK_OK; +} + +/** + * Set the JTAG test mode select (TMS) signal. + * + * @param[in,out] devh Device handle. + * + * @retval JAYLINK_OK Success. + * @retval JAYLINK_ERR_ARG Invalid arguments. + * @retval JAYLINK_ERR_TIMEOUT A timeout occurred. + * @retval JAYLINK_ERR_IO Input/output error. + * @retval JAYLINK_ERR Other error conditions. + * + * @since 0.3.0 + */ +JAYLINK_API int jaylink_jtag_set_tms(struct jaylink_device_handle *devh) +{ + int ret; + struct jaylink_context *ctx; + uint8_t buf[1]; + + if (!devh) + return JAYLINK_ERR_ARG; + + ctx = devh->dev->ctx; + ret = transport_start_write(devh, 1, true); + + if (ret != JAYLINK_OK) { + log_err(ctx, "transport_start_write() failed: %s", + jaylink_strerror(ret)); + return ret; + } + + buf[0] = CMD_JTAG_SET_TMS; + + ret = transport_write(devh, buf, 1); + + if (ret != JAYLINK_OK) { + log_err(ctx, "transport_write() failed: %s", + jaylink_strerror(ret)); + return ret; + } + + return JAYLINK_OK; +} |