Arrow
Repostiory containing DAPLink source code with Reset Pin workaround for HANI_IOT board.
Upstream: https://github.com/ARMmbed/DAPLink
Diff: source/daplink/cmsis-dap/SW_DP.c
- Revision:
- 0:01f31e923fe2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/source/daplink/cmsis-dap/SW_DP.c Tue Apr 07 12:55:42 2020 +0200
@@ -0,0 +1,286 @@
+/*
+ * Copyright (c) 2013-2017 ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ----------------------------------------------------------------------
+ *
+ * $Date: 1. December 2017
+ * $Revision: V2.0.0
+ *
+ * Project: CMSIS-DAP Source
+ * Title: SW_DP.c CMSIS-DAP SW DP I/O
+ *
+ *---------------------------------------------------------------------------*/
+
+#include "DAP_config.h"
+#include "DAP.h"
+
+
+// SW Macros
+
+#define PIN_SWCLK_SET PIN_SWCLK_TCK_SET
+#define PIN_SWCLK_CLR PIN_SWCLK_TCK_CLR
+
+#define SW_CLOCK_CYCLE() \
+ PIN_SWCLK_CLR(); \
+ PIN_DELAY(); \
+ PIN_SWCLK_SET(); \
+ PIN_DELAY()
+
+#define SW_WRITE_BIT(bit) \
+ PIN_SWDIO_OUT(bit); \
+ PIN_SWCLK_CLR(); \
+ PIN_DELAY(); \
+ PIN_SWCLK_SET(); \
+ PIN_DELAY()
+
+#define SW_READ_BIT(bit) \
+ PIN_SWCLK_CLR(); \
+ PIN_DELAY(); \
+ bit = PIN_SWDIO_IN(); \
+ PIN_SWCLK_SET(); \
+ PIN_DELAY()
+
+#define PIN_DELAY() PIN_DELAY_SLOW(DAP_Data.clock_delay)
+
+
+// Generate SWJ Sequence
+// count: sequence bit count
+// data: pointer to sequence bit data
+// return: none
+#if ((DAP_SWD != 0) || (DAP_JTAG != 0))
+void SWJ_Sequence (uint32_t count, const uint8_t *data) {
+ uint32_t val;
+ uint32_t n;
+
+ val = 0U;
+ n = 0U;
+ while (count--) {
+ if (n == 0U) {
+ val = *data++;
+ n = 8U;
+ }
+ if (val & 1U) {
+ PIN_SWDIO_TMS_SET();
+ } else {
+ PIN_SWDIO_TMS_CLR();
+ }
+ SW_CLOCK_CYCLE();
+ val >>= 1;
+ n--;
+ }
+}
+#endif
+
+
+// Generate SWD Sequence
+// info: sequence information
+// swdo: pointer to SWDIO generated data
+// swdi: pointer to SWDIO captured data
+// return: none
+#if (DAP_SWD != 0)
+void SWD_Sequence (uint32_t info, const uint8_t *swdo, uint8_t *swdi) {
+ uint32_t val;
+ uint32_t bit;
+ uint32_t n, k;
+
+ n = info & SWD_SEQUENCE_CLK;
+ if (n == 0U) {
+ n = 64U;
+ }
+
+ if (info & SWD_SEQUENCE_DIN) {
+ while (n) {
+ val = 0U;
+ for (k = 8U; k && n; k--, n--) {
+ SW_READ_BIT(bit);
+ val >>= 1;
+ val |= bit << 7;
+ }
+ val >>= k;
+ *swdi++ = (uint8_t)val;
+ }
+ } else {
+ while (n) {
+ val = *swdo++;
+ for (k = 8U; k && n; k--, n--) {
+ SW_WRITE_BIT(val);
+ val >>= 1;
+ }
+ }
+ }
+}
+#endif
+
+
+#if (DAP_SWD != 0)
+
+
+// SWD Transfer I/O
+// request: A[3:2] RnW APnDP
+// data: DATA[31:0]
+// return: ACK[2:0]
+#define SWD_TransferFunction(speed) /**/ \
+static uint8_t SWD_Transfer##speed (uint32_t request, uint32_t *data) { \
+ uint32_t ack; \
+ uint32_t bit; \
+ uint32_t val; \
+ uint32_t parity; \
+ \
+ uint32_t n; \
+ \
+ /* Packet Request */ \
+ parity = 0U; \
+ SW_WRITE_BIT(1U); /* Start Bit */ \
+ bit = request >> 0; \
+ SW_WRITE_BIT(bit); /* APnDP Bit */ \
+ parity += bit; \
+ bit = request >> 1; \
+ SW_WRITE_BIT(bit); /* RnW Bit */ \
+ parity += bit; \
+ bit = request >> 2; \
+ SW_WRITE_BIT(bit); /* A2 Bit */ \
+ parity += bit; \
+ bit = request >> 3; \
+ SW_WRITE_BIT(bit); /* A3 Bit */ \
+ parity += bit; \
+ SW_WRITE_BIT(parity); /* Parity Bit */ \
+ SW_WRITE_BIT(0U); /* Stop Bit */ \
+ SW_WRITE_BIT(1U); /* Park Bit */ \
+ \
+ /* Turnaround */ \
+ PIN_SWDIO_OUT_DISABLE(); \
+ for (n = DAP_Data.swd_conf.turnaround; n; n--) { \
+ SW_CLOCK_CYCLE(); \
+ } \
+ \
+ /* Acknowledge response */ \
+ SW_READ_BIT(bit); \
+ ack = bit << 0; \
+ SW_READ_BIT(bit); \
+ ack |= bit << 1; \
+ SW_READ_BIT(bit); \
+ ack |= bit << 2; \
+ \
+ if (ack == DAP_TRANSFER_OK) { /* OK response */ \
+ /* Data transfer */ \
+ if (request & DAP_TRANSFER_RnW) { \
+ /* Read data */ \
+ val = 0U; \
+ parity = 0U; \
+ for (n = 32U; n; n--) { \
+ SW_READ_BIT(bit); /* Read RDATA[0:31] */ \
+ parity += bit; \
+ val >>= 1; \
+ val |= bit << 31; \
+ } \
+ SW_READ_BIT(bit); /* Read Parity */ \
+ if ((parity ^ bit) & 1U) { \
+ ack = DAP_TRANSFER_ERROR; \
+ } \
+ if (data) { *data = val; } \
+ /* Turnaround */ \
+ for (n = DAP_Data.swd_conf.turnaround; n; n--) { \
+ SW_CLOCK_CYCLE(); \
+ } \
+ PIN_SWDIO_OUT_ENABLE(); \
+ } else { \
+ /* Turnaround */ \
+ for (n = DAP_Data.swd_conf.turnaround; n; n--) { \
+ SW_CLOCK_CYCLE(); \
+ } \
+ PIN_SWDIO_OUT_ENABLE(); \
+ /* Write data */ \
+ val = *data; \
+ parity = 0U; \
+ for (n = 32U; n; n--) { \
+ SW_WRITE_BIT(val); /* Write WDATA[0:31] */ \
+ parity += val; \
+ val >>= 1; \
+ } \
+ SW_WRITE_BIT(parity); /* Write Parity Bit */ \
+ } \
+ /* Capture Timestamp */ \
+ if (request & DAP_TRANSFER_TIMESTAMP) { \
+ DAP_Data.timestamp = TIMESTAMP_GET(); \
+ } \
+ /* Idle cycles */ \
+ n = DAP_Data.transfer.idle_cycles; \
+ if (n) { \
+ PIN_SWDIO_OUT(0U); \
+ for (; n; n--) { \
+ SW_CLOCK_CYCLE(); \
+ } \
+ } \
+ PIN_SWDIO_OUT(1U); \
+ return ((uint8_t)ack); \
+ } \
+ \
+ if ((ack == DAP_TRANSFER_WAIT) || (ack == DAP_TRANSFER_FAULT)) { \
+ /* WAIT or FAULT response */ \
+ if (DAP_Data.swd_conf.data_phase && ((request & DAP_TRANSFER_RnW) != 0U)) { \
+ for (n = 32U+1U; n; n--) { \
+ SW_CLOCK_CYCLE(); /* Dummy Read RDATA[0:31] + Parity */ \
+ } \
+ } \
+ /* Turnaround */ \
+ for (n = DAP_Data.swd_conf.turnaround; n; n--) { \
+ SW_CLOCK_CYCLE(); \
+ } \
+ PIN_SWDIO_OUT_ENABLE(); \
+ if (DAP_Data.swd_conf.data_phase && ((request & DAP_TRANSFER_RnW) == 0U)) { \
+ PIN_SWDIO_OUT(0U); \
+ for (n = 32U+1U; n; n--) { \
+ SW_CLOCK_CYCLE(); /* Dummy Write WDATA[0:31] + Parity */ \
+ } \
+ } \
+ PIN_SWDIO_OUT(1U); \
+ return ((uint8_t)ack); \
+ } \
+ \
+ /* Protocol error */ \
+ for (n = DAP_Data.swd_conf.turnaround + 32U + 1U; n; n--) { \
+ SW_CLOCK_CYCLE(); /* Back off data phase */ \
+ } \
+ PIN_SWDIO_OUT_ENABLE(); \
+ PIN_SWDIO_OUT(1U); \
+ return ((uint8_t)ack); \
+}
+
+
+#undef PIN_DELAY
+#define PIN_DELAY() PIN_DELAY_FAST()
+SWD_TransferFunction(Fast)
+
+#undef PIN_DELAY
+#define PIN_DELAY() PIN_DELAY_SLOW(DAP_Data.clock_delay)
+SWD_TransferFunction(Slow)
+
+
+// SWD Transfer I/O
+// request: A[3:2] RnW APnDP
+// data: DATA[31:0]
+// return: ACK[2:0]
+uint8_t SWD_Transfer(uint32_t request, uint32_t *data) {
+ if (DAP_Data.fast_clock) {
+ return SWD_TransferFast(request, data);
+ } else {
+ return SWD_TransferSlow(request, data);
+ }
+}
+
+
+#endif /* (DAP_SWD != 0) */