Amit Gandhi
test
Fork of
mbed-dev
by 
mbed official
Diff: targets/TARGET_Realtek/TARGET_AMEBA/spi_api.c
- Revision:
- 168:e84263d55307
- Child:
- 171:19eb464bc2be
diff -r c97ed07ec1a8 -r e84263d55307 targets/TARGET_Realtek/TARGET_AMEBA/spi_api.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/spi_api.c Wed Jun 21 17:46:44 2017 +0100
@@ -0,0 +1,295 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2013-2016 Realtek Semiconductor Corp.
+ *
+ * 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
+ *
+ * http://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.
+ */
+
+#include "objects.h"
+#include "spi_api.h"
+
+#include "PinNames.h"
+#include "pinmap.h"
+#include "hal_ssi.h"
+
+extern u32 SystemGetCpuClk(VOID);
+extern VOID HAL_GPIO_PullCtrl(u32 pin, u32 mode);
+
+void spi_tx_done_callback(VOID *obj);
+void spi_rx_done_callback(VOID *obj);
+void spi_bus_tx_done_callback(VOID *obj);
+
+
+//TODO: Load default Setting: It should be loaded from external setting file.
+extern const DW_SSI_DEFAULT_SETTING SpiDefaultSetting;
+
+static const PinMap PinMap_SSI_MOSI[] = {
+ {PE_2, RTL_PIN_PERI(SPI0, 0, S0), RTL_PIN_FUNC(SPI0, S0)},
+ {PC_2, RTL_PIN_PERI(SPI0, 0, S1), RTL_PIN_FUNC(SPI0, S1)},
+ {PA_1, RTL_PIN_PERI(SPI1, 1, S0), RTL_PIN_FUNC(SPI1, S0)},
+ {PB_6, RTL_PIN_PERI(SPI1, 1, S1), RTL_PIN_FUNC(SPI1, S1)},
+ {PD_6, RTL_PIN_PERI(SPI1, 1, S2), RTL_PIN_FUNC(SPI1, S2)},
+ {PG_2, RTL_PIN_PERI(SPI2, 2, S0), RTL_PIN_FUNC(SPI2, S0)},
+ {PE_6, RTL_PIN_PERI(SPI2, 2, S1), RTL_PIN_FUNC(SPI2, S1)},
+ {PD_2, RTL_PIN_PERI(SPI2, 2, S2), RTL_PIN_FUNC(SPI2, S2)},
+ {NC, NC, 0}
+};
+
+static const PinMap PinMap_SSI_MISO[] = {
+ {PE_3, RTL_PIN_PERI(SPI0, 0, S0), RTL_PIN_FUNC(SPI0, S0)},
+ {PC_3, RTL_PIN_PERI(SPI0, 0, S1), RTL_PIN_FUNC(SPI0, S1)},
+ {PA_0, RTL_PIN_PERI(SPI1, 1, S0), RTL_PIN_FUNC(SPI1, S0)},
+ {PB_7, RTL_PIN_PERI(SPI1, 1, S1), RTL_PIN_FUNC(SPI1, S1)},
+ {PD_7, RTL_PIN_PERI(SPI1, 1, S2), RTL_PIN_FUNC(SPI1, S2)},
+ {PG_3, RTL_PIN_PERI(SPI2, 2, S0), RTL_PIN_FUNC(SPI2, S0)},
+ {PE_7, RTL_PIN_PERI(SPI2, 2, S1), RTL_PIN_FUNC(SPI2, S1)},
+ {PD_3, RTL_PIN_PERI(SPI2, 2, S2), RTL_PIN_FUNC(SPI2, S2)},
+ {NC, NC, 0}
+};
+
+
+void spi_init (spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
+{
+ SSI_DBG_ENTRANCE("spi_init()\n");
+
+ uint32_t ssi_mosi, ssi_miso, ssi_peri;
+ uint8_t ssi_idx, ssi_pinmux;
+ PHAL_SSI_ADAPTOR pHalSsiAdaptor;
+ PHAL_SSI_OP pHalSsiOp;
+
+ _memset((void*)obj, 0, sizeof(spi_t));
+ obj->state = 0;
+ uint32_t SystemClock = SystemGetCpuClk();
+ uint32_t MaxSsiFreq = (SystemClock >> 2) >> 1;
+
+ /* SsiClockDivider doesn't support odd number */
+
+ DBG_SSI_INFO("SystemClock: %d\n", SystemClock);
+ DBG_SSI_INFO("MaxSsiFreq : %d\n", MaxSsiFreq);
+
+ ssi_mosi = pinmap_peripheral(mosi, PinMap_SSI_MOSI);
+ ssi_miso = pinmap_peripheral(miso, PinMap_SSI_MISO);
+
+ ssi_peri = pinmap_merge(ssi_mosi, ssi_miso);
+ if (unlikely(ssi_peri == NC)) {
+ DBG_SSI_ERR("spi_init(): Cannot find matched SSI index.\n");
+ return;
+ }
+ obj->sclk = (u8)sclk;
+ ssi_idx = RTL_GET_PERI_IDX(ssi_peri);
+ ssi_pinmux = RTL_GET_PERI_SEL(ssi_peri);
+ DBG_SSI_INFO("ssi_peri: %d, ssi_idx: %d, ssi_pinmux: %d\n", ssi_peri, ssi_idx, ssi_pinmux);
+
+ pHalSsiAdaptor = &obj->spi_adp;
+ pHalSsiOp = &obj->spi_op;
+
+ pHalSsiAdaptor->Index = ssi_idx;
+ pHalSsiAdaptor->PinmuxSelect = ssi_pinmux;
+ pHalSsiAdaptor->Role = SSI_MASTER;
+
+ HalSsiOpInit((VOID*)pHalSsiOp);
+
+ pHalSsiOp->HalSsiSetDeviceRole(pHalSsiAdaptor, pHalSsiAdaptor->Role);
+
+ /* Pinmux workaround */
+ if ((ssi_idx == 0) && (ssi_pinmux == SSI0_MUX_TO_GPIOC)) {
+ EEPROM_PIN_CTRL(OFF);
+ }
+
+ if ((ssi_idx == 0) && (ssi_pinmux == SSI0_MUX_TO_GPIOE)) {
+ DBG_SSI_WARN(ANSI_COLOR_MAGENTA"SPI0 Pin may conflict with JTAG\r\n"ANSI_COLOR_RESET);
+ }
+
+ //TODO: Implement default setting structure.
+ pHalSsiOp->HalSsiLoadSetting(pHalSsiAdaptor, (void*)&SpiDefaultSetting);
+ pHalSsiAdaptor->DefaultRxThresholdLevel = SpiDefaultSetting.RxThresholdLevel;
+
+ if(HalSsiInit(pHalSsiAdaptor) != HAL_OK){
+ DBG_SSI_ERR(ANSI_COLOR_RED"spi_init(): SPI %x init fails.\n"ANSI_COLOR_RESET,pHalSsiAdaptor->Index);
+ return;
+ }
+ osDelay(1);
+}
+
+void spi_free (spi_t *obj)
+{
+ PHAL_SSI_ADAPTOR pHalSsiAdaptor;
+ pHalSsiAdaptor = &obj->spi_adp;
+ HalSsiDeInit(pHalSsiAdaptor);
+
+ SPI0_MULTI_CS_CTRL(OFF);
+}
+
+void spi_format (spi_t *obj, int bits, int mode, int slave)
+{
+ PHAL_SSI_ADAPTOR pHalSsiAdaptor;
+ PHAL_SSI_OP pHalSsiOp;
+
+ pHalSsiAdaptor = &obj->spi_adp;
+ pHalSsiOp = &obj->spi_op;
+
+ pHalSsiAdaptor->DataFrameSize = (bits - 1);
+
+ /*
+ * mode | POL PHA
+ * -----+--------
+ * 0 | 0 0
+ * 1 | 0 1
+ * 2 | 1 0
+ * 3 | 1 1
+ *
+ * SCPOL_INACTIVE_IS_LOW = 0,
+ * SCPOL_INACTIVE_IS_HIGH = 1
+ *
+ * SCPH_TOGGLES_IN_MIDDLE = 0,
+ * SCPH_TOGGLES_AT_START = 1
+ */
+ switch (mode)
+ {
+ case 0:
+ pHalSsiAdaptor->SclkPolarity = SCPOL_INACTIVE_IS_LOW;
+ pHalSsiAdaptor->SclkPhase = SCPH_TOGGLES_IN_MIDDLE;
+ break;
+ case 1:
+ pHalSsiAdaptor->SclkPolarity = SCPOL_INACTIVE_IS_LOW;
+ pHalSsiAdaptor->SclkPhase = SCPH_TOGGLES_AT_START;
+ break;
+ case 2:
+ pHalSsiAdaptor->SclkPolarity = SCPOL_INACTIVE_IS_HIGH;
+ pHalSsiAdaptor->SclkPhase = SCPH_TOGGLES_IN_MIDDLE;
+ break;
+ case 3:
+ pHalSsiAdaptor->SclkPolarity = SCPOL_INACTIVE_IS_HIGH;
+ pHalSsiAdaptor->SclkPhase = SCPH_TOGGLES_AT_START;
+ break;
+ default: // same as 3
+ pHalSsiAdaptor->SclkPolarity = SCPOL_INACTIVE_IS_HIGH;
+ pHalSsiAdaptor->SclkPhase = SCPH_TOGGLES_AT_START;
+ break;
+ }
+
+ if (slave == 1) {
+ if (pHalSsiAdaptor->Index == 0) {
+ pHalSsiAdaptor->Role = SSI_SLAVE;
+ pHalSsiAdaptor->SlaveOutputEnable = SLV_TXD_ENABLE; // <-- Slave only
+ DBG_SSI_INFO("SPI0 is as slave\n");
+ } else {
+ DBG_SSI_ERR("The SPI%d cannot work as Slave mode, only SPI0 does.\r\n", pHalSsiAdaptor->Index);
+ pHalSsiAdaptor->Role = SSI_MASTER;
+ }
+ } else {
+ pHalSsiAdaptor->Role = SSI_MASTER;
+ }
+ pHalSsiOp->HalSsiSetDeviceRole(pHalSsiAdaptor, pHalSsiAdaptor->Role);
+
+#ifdef CONFIG_GPIO_EN
+ if (pHalSsiAdaptor->Role == SSI_SLAVE) {
+ if (pHalSsiAdaptor->SclkPolarity == SCPOL_INACTIVE_IS_LOW) {
+ HAL_GPIO_PullCtrl((u32)obj->sclk, hal_PullDown);
+ } else {
+ HAL_GPIO_PullCtrl((u32)obj->sclk, hal_PullUp);
+ }
+ }
+#endif
+ HalSsiSetFormat(pHalSsiAdaptor);
+}
+
+void spi_frequency (spi_t *obj, int hz)
+{
+ PHAL_SSI_ADAPTOR pHalSsiAdaptor;
+
+ pHalSsiAdaptor = &obj->spi_adp;
+ HalSsiSetSclk(pHalSsiAdaptor, (u32)hz);
+}
+
+static inline void ssi_write (spi_t *obj, int value)
+{
+ PHAL_SSI_ADAPTOR pHalSsiAdaptor;
+ PHAL_SSI_OP pHalSsiOp;
+
+ pHalSsiAdaptor = &obj->spi_adp;
+ pHalSsiOp = &obj->spi_op;
+
+ while (!pHalSsiOp->HalSsiWriteable(pHalSsiAdaptor));
+ pHalSsiOp->HalSsiWrite((VOID*)pHalSsiAdaptor, value);
+}
+
+static inline int ssi_read(spi_t *obj)
+{
+ PHAL_SSI_ADAPTOR pHalSsiAdaptor;
+ PHAL_SSI_OP pHalSsiOp;
+
+ pHalSsiAdaptor = &obj->spi_adp;
+ pHalSsiOp = &obj->spi_op;
+
+ while (!pHalSsiOp->HalSsiReadable(pHalSsiAdaptor));
+ return (int)pHalSsiOp->HalSsiRead(pHalSsiAdaptor);
+}
+
+int spi_master_write (spi_t *obj, int value)
+{
+ ssi_write(obj, value);
+ return ssi_read(obj);
+}
+
+int spi_master_block_write(spi_t *obj, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length)
+{
+ int total = (tx_length > rx_length) ? tx_length : rx_length;
+
+ for (int i = 0; i < total; i++) {
+ char out = (i < tx_length) ? tx_buffer[i] : 0xff;
+ char in = spi_master_write(obj, out);
+ if (i < rx_length) {
+ rx_buffer[i] = in;
+ }
+ }
+
+ return total;
+}
+
+int spi_slave_receive (spi_t *obj)
+{
+ PHAL_SSI_ADAPTOR pHalSsiAdaptor;
+ PHAL_SSI_OP pHalSsiOp;
+ int Readable;
+ int Busy;
+
+ pHalSsiAdaptor = &obj->spi_adp;
+ pHalSsiOp = &obj->spi_op;
+
+ Readable = pHalSsiOp->HalSsiReadable(pHalSsiAdaptor);
+ Busy = (int)pHalSsiOp->HalSsiBusy(pHalSsiAdaptor);
+ return ((Readable && !Busy) ? 1 : 0);
+}
+
+int spi_slave_read (spi_t *obj)
+{
+ return ssi_read(obj);
+}
+
+void spi_slave_write (spi_t *obj, int value)
+{
+ ssi_write(obj, value);
+}
+
+int spi_busy (spi_t *obj)
+{
+ PHAL_SSI_ADAPTOR pHalSsiAdaptor;
+ PHAL_SSI_OP pHalSsiOp;
+
+ pHalSsiAdaptor = &obj->spi_adp;
+ pHalSsiOp = &obj->spi_op;
+
+ return (int)pHalSsiOp->HalSsiBusy(pHalSsiAdaptor);
+}
+
+