applications: sdp: mspi: remove toggling of pins after TX

Remove toggling of not used pins after sending data on SINGLE.

Signed-off-by: Magdalena Pastula <[email protected]>

Author: magp-nordic

applications/sdp/mspi/src/hrt/hrt-nrf54l15.s

@@ -239,8 +239,12 @@ hrt_write:
 	addi	sp,sp,-16
 	sw	s0,8(sp)
 	sw	ra,12(sp)
+	sw	s1,4(sp)
 	mv	s0,a0
 	sb	zero,3(sp)
+ #APP
+	csrr s1, 3008
+ #NO_APP
 	lhu	a5,90(a0)
  #APP
 	csrw 3009, a5
@@ -344,11 +348,16 @@ hrt_write:
 	call	hrt_tx
 	lbu	a5,94(s0)
 	bne	a5,zero,.L43
-	li	a5,16384
+	li	a5,4096
 	addi	a5,a5,1
  #APP
 	csrw 3019, a5
-	csrw 3017, 0
+ #NO_APP
+	slli	s1,s1,1
+	slli	s1,s1,16
+	srli	s1,s1,16
+ #APP
+	csrw 3012, s1
 	csrw 2000, 0
  #NO_APP
 .L44:
@@ -370,6 +379,7 @@ hrt_write:
 .L31:
 	lw	ra,12(sp)
 	lw	s0,8(sp)
+	lw	s1,4(sp)
 	addi	sp,sp,16
 	jr	ra
 .L38:
@@ -389,7 +399,7 @@ hrt_write:
  #APP
 	csrw 2000, 0
  #NO_APP
-	li	a5,16384
+	li	a5,4096
 	addi	a5,a5,1
  #APP
 	csrw 3019, a5

applications/sdp/mspi/src/hrt/hrt.c

@@ -31,7 +31,7 @@
 static const nrf_vpr_csr_vio_shift_ctrl_t write_final_shift_ctrl_cfg = {
 	.shift_count = 1,
 	.out_mode = NRF_VPR_CSR_VIO_SHIFT_NONE,
-	.frame_width = 4,
+	.frame_width = 1,
 	.in_mode = NRF_VPR_CSR_VIO_MODE_IN_CONTINUOUS,
 };
 
@@ -125,6 +125,12 @@ void hrt_write(hrt_xfer_t *hrt_xfer_params)
 
 	nrf_vpr_csr_vio_mode_out_t out_mode = {.mode = NRF_VPR_CSR_VIO_SHIFT_OUTB_TOGGLE};
 
+	/*
+	 * Least significant bit is ignored when the whole OUTB is shifted to OUT at once after
+	 * switching to no shifting mode, so the read value need to be shifted left by 1.
+	 */
+	uint16_t prev_out = nrf_vpr_csr_vio_out_get() << 1;
+
 	/* Configure clock and pins */
 	nrf_vpr_csr_vio_dir_set(hrt_xfer_params->tx_direction_mask);
 
@@ -199,7 +205,7 @@ void hrt_write(hrt_xfer_t *hrt_xfer_params)
 	 */
 	if (hrt_xfer_params->cpp_mode == MSPI_CPP_MODE_0) {
 		nrf_vpr_csr_vio_shift_ctrl_buffered_set(&write_final_shift_ctrl_cfg);
-		nrf_vpr_csr_vio_out_buffered_reversed_word_set(0x00);
+		nrf_vpr_csr_vio_out_buffered_set(prev_out);
 		nrf_vpr_csr_vtim_count_mode_set(0, NRF_VPR_CSR_VTIM_COUNT_STOP);
 	} else {
 		while (nrf_vpr_csr_vio_shift_cnt_out_get() != 0) {