int
urj_tap_chain_set_trst (urj_chain_t *chain, int trst)
{
int old_val = urj_tap_cable_set_signal (chain->cable, URJ_POD_CS_TRST,
trst ? URJ_POD_CS_TRST : 0);
int old_trst = (old_val & URJ_POD_CS_TRST) ? 1 : 0;
urj_tap_state_set_trst (chain, old_trst, trst);
return trst;
}
/**
* This function sets interface buffers to MOSI direction.
* MOSI (Master Output Slave Input) is a SWD Write operation.
* \param *libswdctx is the swd context to work on.
* \param bits specify how many clock cycles must be used for TRN.
* \return number of bits transmitted or negative LIBSWD_ERROR code on failure.
*/
int libswd_drv_mosi_trn(libswd_ctx_t *libswdctx, int bits){
if (bits<LIBSWD_TURNROUND_MIN_VAL && bits>LIBSWD_TURNROUND_MAX_VAL)
return LIBSWD_ERROR_TURNAROUND;
int res;
res=urj_tap_cable_set_signal((urj_cable_t *)libswdctx->driver->device, URJ_POD_CS_RnW, 0);
if (res<0) return LIBSWD_ERROR_DRIVER;
/* void urj_tap_cable_clock (urj_cable_t *cable, int tms, int tdi, int n); */
urj_tap_cable_clock((urj_cable_t *)libswdctx->driver->device, 1, 1, bits);
return bits;
}
int
urj_tap_chain_set_pod_signal (urj_chain_t *chain, int mask, int val)
{
int old_val = urj_tap_cable_set_signal (chain->cable, mask, val);
int old_trst = (old_val & URJ_POD_CS_TRST) ? 1 : 0;
int new_trst =
(((old_val & ~mask) | (val & mask)) & URJ_POD_CS_TRST) ? 1 : 0;
urj_tap_state_set_trst (chain, old_trst, new_trst);
return old_val;
}
