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targets/TARGET_NUVOTON/TARGET_NANO100/serial_api.c@177:447f873cad2f, 2017-10-25 (annotated)

Committer:
AnnaBridge
Date:
Wed Oct 25 14:53:38 2017 +0100
Revision:
177:447f873cad2f
Parent:
175:b96e65c34a4d 
This updates the lib to the mbed lib v 154

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 175:b96e65c34a4d 1 /* mbed Microcontroller Library
AnnaBridge 175:b96e65c34a4d 2 * Copyright (c) 2015-2017 Nuvoton
AnnaBridge 175:b96e65c34a4d 3 *
AnnaBridge 175:b96e65c34a4d 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 175:b96e65c34a4d 5 * you may not use this file except in compliance with the License.
AnnaBridge 175:b96e65c34a4d 6 * You may obtain a copy of the License at
AnnaBridge 175:b96e65c34a4d 7 *
AnnaBridge 175:b96e65c34a4d 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 175:b96e65c34a4d 9 *
AnnaBridge 175:b96e65c34a4d 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 175:b96e65c34a4d 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 175:b96e65c34a4d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 175:b96e65c34a4d 13 * See the License for the specific language governing permissions and
AnnaBridge 175:b96e65c34a4d 14 * limitations under the License.
AnnaBridge 175:b96e65c34a4d 15 */
AnnaBridge 175:b96e65c34a4d 16
AnnaBridge 175:b96e65c34a4d 17 #include "serial_api.h"
AnnaBridge 175:b96e65c34a4d 18
AnnaBridge 175:b96e65c34a4d 19 #if DEVICE_SERIAL
AnnaBridge 175:b96e65c34a4d 20
AnnaBridge 175:b96e65c34a4d 21 #include <string.h>
AnnaBridge 175:b96e65c34a4d 22 #include "cmsis.h"
AnnaBridge 175:b96e65c34a4d 23 #include "mbed_error.h"
AnnaBridge 175:b96e65c34a4d 24 #include "mbed_assert.h"
AnnaBridge 175:b96e65c34a4d 25 #include "PeripheralPins.h"
AnnaBridge 175:b96e65c34a4d 26 #include "nu_modutil.h"
AnnaBridge 175:b96e65c34a4d 27 #include "nu_bitutil.h"
AnnaBridge 175:b96e65c34a4d 28
AnnaBridge 175:b96e65c34a4d 29 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 30 #include "dma_api.h"
AnnaBridge 175:b96e65c34a4d 31 #include "dma.h"
AnnaBridge 175:b96e65c34a4d 32 #endif
AnnaBridge 175:b96e65c34a4d 33
AnnaBridge 175:b96e65c34a4d 34 struct nu_uart_var {
AnnaBridge 175:b96e65c34a4d 35 uint32_t ref_cnt; // Reference count of the H/W module
AnnaBridge 175:b96e65c34a4d 36 serial_t * obj;
AnnaBridge 175:b96e65c34a4d 37 uint32_t fifo_size_tx;
AnnaBridge 175:b96e65c34a4d 38 uint32_t fifo_size_rx;
AnnaBridge 175:b96e65c34a4d 39 void (*vec)(void);
AnnaBridge 175:b96e65c34a4d 40 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 41 uint8_t pdma_perp_tx;
AnnaBridge 175:b96e65c34a4d 42 uint8_t pdma_perp_rx;
AnnaBridge 175:b96e65c34a4d 43 #endif
AnnaBridge 175:b96e65c34a4d 44 };
AnnaBridge 175:b96e65c34a4d 45
AnnaBridge 175:b96e65c34a4d 46 void UART0_IRQHandler(void);
AnnaBridge 175:b96e65c34a4d 47 void UART1_IRQHandler(void);
AnnaBridge 175:b96e65c34a4d 48 static void uart_irq(serial_t *obj);
AnnaBridge 175:b96e65c34a4d 49
AnnaBridge 175:b96e65c34a4d 50 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 51 static void uart_irq_async(serial_t *obj);
AnnaBridge 175:b96e65c34a4d 52
AnnaBridge 175:b96e65c34a4d 53 static void uart_dma_handler_tx(uint32_t id, uint32_t event);
AnnaBridge 175:b96e65c34a4d 54 static void uart_dma_handler_rx(uint32_t id, uint32_t event);
AnnaBridge 175:b96e65c34a4d 55
AnnaBridge 175:b96e65c34a4d 56 static void serial_tx_enable_interrupt(serial_t *obj, uint32_t address, uint8_t enable);
AnnaBridge 175:b96e65c34a4d 57 static void serial_rx_enable_interrupt(serial_t *obj, uint32_t address, uint8_t enable);
AnnaBridge 175:b96e65c34a4d 58 static void serial_enable_interrupt(serial_t *obj, SerialIrq irq, uint32_t enable);
AnnaBridge 175:b96e65c34a4d 59 static void serial_rollback_interrupt(serial_t *obj, SerialIrq irq);
AnnaBridge 175:b96e65c34a4d 60 static int serial_write_async(serial_t *obj);
AnnaBridge 175:b96e65c34a4d 61 static int serial_read_async(serial_t *obj);
AnnaBridge 175:b96e65c34a4d 62
AnnaBridge 175:b96e65c34a4d 63 static uint32_t serial_rx_event_check(serial_t *obj);
AnnaBridge 175:b96e65c34a4d 64 static uint32_t serial_tx_event_check(serial_t *obj);
AnnaBridge 175:b96e65c34a4d 65
AnnaBridge 175:b96e65c34a4d 66 static int serial_is_tx_complete(serial_t *obj);
AnnaBridge 175:b96e65c34a4d 67 static void serial_tx_enable_event(serial_t *obj, int event, uint8_t enable);
AnnaBridge 175:b96e65c34a4d 68
AnnaBridge 175:b96e65c34a4d 69 static void serial_tx_buffer_set(serial_t *obj, const void *tx, size_t length, uint8_t width);
AnnaBridge 175:b96e65c34a4d 70 static void serial_rx_buffer_set(serial_t *obj, void *rx, size_t length, uint8_t width);
AnnaBridge 175:b96e65c34a4d 71 static void serial_rx_set_char_match(serial_t *obj, uint8_t char_match);
AnnaBridge 175:b96e65c34a4d 72 static void serial_rx_enable_event(serial_t *obj, int event, uint8_t enable);
AnnaBridge 175:b96e65c34a4d 73 static int serial_is_rx_complete(serial_t *obj);
AnnaBridge 175:b96e65c34a4d 74
AnnaBridge 175:b96e65c34a4d 75 static void serial_check_dma_usage(DMAUsage *dma_usage, int *dma_ch);
AnnaBridge 175:b96e65c34a4d 76 static int serial_is_irq_en(serial_t *obj, SerialIrq irq);
AnnaBridge 175:b96e65c34a4d 77 #endif
AnnaBridge 175:b96e65c34a4d 78
AnnaBridge 175:b96e65c34a4d 79 static struct nu_uart_var uart0_var = {
AnnaBridge 175:b96e65c34a4d 80 .ref_cnt = 0,
AnnaBridge 175:b96e65c34a4d 81 .obj = NULL,
AnnaBridge 175:b96e65c34a4d 82 .fifo_size_tx = 16,
AnnaBridge 175:b96e65c34a4d 83 .fifo_size_rx = 16,
AnnaBridge 175:b96e65c34a4d 84 .vec = UART0_IRQHandler,
AnnaBridge 175:b96e65c34a4d 85 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 86 .pdma_perp_tx = PDMA_UART0_TX,
AnnaBridge 175:b96e65c34a4d 87 .pdma_perp_rx = PDMA_UART0_RX
AnnaBridge 175:b96e65c34a4d 88 #endif
AnnaBridge 175:b96e65c34a4d 89 };
AnnaBridge 175:b96e65c34a4d 90 static struct nu_uart_var uart1_var = {
AnnaBridge 175:b96e65c34a4d 91 .ref_cnt = 0,
AnnaBridge 175:b96e65c34a4d 92 .obj = NULL,
AnnaBridge 175:b96e65c34a4d 93 .fifo_size_tx = 16,
AnnaBridge 175:b96e65c34a4d 94 .fifo_size_rx = 16,
AnnaBridge 175:b96e65c34a4d 95 .vec = UART1_IRQHandler,
AnnaBridge 175:b96e65c34a4d 96 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 97 .pdma_perp_tx = PDMA_UART1_TX,
AnnaBridge 175:b96e65c34a4d 98 .pdma_perp_rx = PDMA_UART1_RX
AnnaBridge 175:b96e65c34a4d 99 #endif
AnnaBridge 175:b96e65c34a4d 100 };
AnnaBridge 175:b96e65c34a4d 101
AnnaBridge 175:b96e65c34a4d 102
AnnaBridge 175:b96e65c34a4d 103 int stdio_uart_inited = 0;
AnnaBridge 175:b96e65c34a4d 104 serial_t stdio_uart;
AnnaBridge 175:b96e65c34a4d 105 static uint32_t uart_modinit_mask = 0;
AnnaBridge 175:b96e65c34a4d 106
AnnaBridge 175:b96e65c34a4d 107 static const struct nu_modinit_s uart_modinit_tab[] = {
AnnaBridge 175:b96e65c34a4d 108 {UART_0, UART0_MODULE, CLK_CLKSEL1_UART_S_HIRC, CLK_UART_CLK_DIVIDER(1), UART0_RST, UART0_IRQn, &uart0_var},
AnnaBridge 175:b96e65c34a4d 109 {UART_1, UART1_MODULE, CLK_CLKSEL1_UART_S_HIRC, CLK_UART_CLK_DIVIDER(1), UART1_RST, UART1_IRQn, &uart1_var},
AnnaBridge 175:b96e65c34a4d 110
AnnaBridge 175:b96e65c34a4d 111 {NC, 0, 0, 0, 0, (IRQn_Type) 0, NULL}
AnnaBridge 175:b96e65c34a4d 112 };
AnnaBridge 175:b96e65c34a4d 113
AnnaBridge 175:b96e65c34a4d 114 extern void mbed_sdk_init(void);
AnnaBridge 175:b96e65c34a4d 115
AnnaBridge 175:b96e65c34a4d 116 void serial_init(serial_t *obj, PinName tx, PinName rx)
AnnaBridge 175:b96e65c34a4d 117 {
AnnaBridge 175:b96e65c34a4d 118 // NOTE: With armcc, serial_init() gets called from _sys_open() timing of which is before main()/mbed_sdk_init().
AnnaBridge 175:b96e65c34a4d 119 mbed_sdk_init();
AnnaBridge 175:b96e65c34a4d 120
AnnaBridge 175:b96e65c34a4d 121 // Determine which UART_x the pins are used for
AnnaBridge 175:b96e65c34a4d 122 uint32_t uart_tx = pinmap_peripheral(tx, PinMap_UART_TX);
AnnaBridge 175:b96e65c34a4d 123 uint32_t uart_rx = pinmap_peripheral(rx, PinMap_UART_RX);
AnnaBridge 175:b96e65c34a4d 124 // Get the peripheral name (UART_x) from the pins and assign it to the object
AnnaBridge 175:b96e65c34a4d 125 obj->serial.uart = (UARTName) pinmap_merge(uart_tx, uart_rx);
AnnaBridge 175:b96e65c34a4d 126 MBED_ASSERT((int)obj->serial.uart != NC);
AnnaBridge 175:b96e65c34a4d 127
AnnaBridge 175:b96e65c34a4d 128 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 129 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 130 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 131
AnnaBridge 175:b96e65c34a4d 132 struct nu_uart_var *var = (struct nu_uart_var *) modinit->var;
AnnaBridge 175:b96e65c34a4d 133
AnnaBridge 175:b96e65c34a4d 134 if (! var->ref_cnt) {
AnnaBridge 175:b96e65c34a4d 135 // Reset this module
AnnaBridge 175:b96e65c34a4d 136 SYS_ResetModule(modinit->rsetidx);
AnnaBridge 175:b96e65c34a4d 137
AnnaBridge 175:b96e65c34a4d 138 // Select IP clock source
AnnaBridge 175:b96e65c34a4d 139 CLK_SetModuleClock(modinit->clkidx, modinit->clksrc, modinit->clkdiv);
AnnaBridge 175:b96e65c34a4d 140 // Enable IP clock
AnnaBridge 175:b96e65c34a4d 141 CLK_EnableModuleClock(modinit->clkidx);
AnnaBridge 175:b96e65c34a4d 142
AnnaBridge 175:b96e65c34a4d 143 pinmap_pinout(tx, PinMap_UART_TX);
AnnaBridge 175:b96e65c34a4d 144 pinmap_pinout(rx, PinMap_UART_RX);
AnnaBridge 175:b96e65c34a4d 145
AnnaBridge 175:b96e65c34a4d 146 obj->serial.pin_tx = tx;
AnnaBridge 175:b96e65c34a4d 147 obj->serial.pin_rx = rx;
AnnaBridge 175:b96e65c34a4d 148 }
AnnaBridge 175:b96e65c34a4d 149 var->ref_cnt ++;
AnnaBridge 175:b96e65c34a4d 150
AnnaBridge 175:b96e65c34a4d 151 // Configure the UART module and set its baudrate
AnnaBridge 175:b96e65c34a4d 152 serial_baud(obj, 9600);
AnnaBridge 175:b96e65c34a4d 153 // Configure data bits, parity, and stop bits
AnnaBridge 175:b96e65c34a4d 154 serial_format(obj, 8, ParityNone, 1);
AnnaBridge 175:b96e65c34a4d 155
AnnaBridge 175:b96e65c34a4d 156 obj->serial.vec = var->vec;
AnnaBridge 175:b96e65c34a4d 157 obj->serial.irq_en = 0;
AnnaBridge 175:b96e65c34a4d 158
AnnaBridge 175:b96e65c34a4d 159 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 160 obj->serial.dma_usage_tx = DMA_USAGE_NEVER;
AnnaBridge 175:b96e65c34a4d 161 obj->serial.dma_usage_rx = DMA_USAGE_NEVER;
AnnaBridge 175:b96e65c34a4d 162 obj->serial.event = 0;
AnnaBridge 175:b96e65c34a4d 163 obj->serial.dma_chn_id_tx = DMA_ERROR_OUT_OF_CHANNELS;
AnnaBridge 175:b96e65c34a4d 164 obj->serial.dma_chn_id_rx = DMA_ERROR_OUT_OF_CHANNELS;
AnnaBridge 175:b96e65c34a4d 165 #endif
AnnaBridge 175:b96e65c34a4d 166
AnnaBridge 175:b96e65c34a4d 167 // For stdio management
AnnaBridge 175:b96e65c34a4d 168 if (obj->serial.uart == STDIO_UART) {
AnnaBridge 175:b96e65c34a4d 169 stdio_uart_inited = 1;
AnnaBridge 175:b96e65c34a4d 170 memcpy(&stdio_uart, obj, sizeof(serial_t));
AnnaBridge 175:b96e65c34a4d 171 }
AnnaBridge 175:b96e65c34a4d 172
AnnaBridge 175:b96e65c34a4d 173 if (var->ref_cnt) {
AnnaBridge 175:b96e65c34a4d 174 // Mark this module to be inited.
AnnaBridge 175:b96e65c34a4d 175 int i = modinit - uart_modinit_tab;
AnnaBridge 175:b96e65c34a4d 176 uart_modinit_mask |= 1 << i;
AnnaBridge 175:b96e65c34a4d 177 }
AnnaBridge 175:b96e65c34a4d 178 }
AnnaBridge 175:b96e65c34a4d 179
AnnaBridge 175:b96e65c34a4d 180 void serial_free(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 181 {
AnnaBridge 175:b96e65c34a4d 182 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 183 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 184 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 185
AnnaBridge 175:b96e65c34a4d 186 struct nu_uart_var *var = (struct nu_uart_var *) modinit->var;
AnnaBridge 175:b96e65c34a4d 187
AnnaBridge 175:b96e65c34a4d 188 var->ref_cnt --;
AnnaBridge 175:b96e65c34a4d 189 if (! var->ref_cnt) {
AnnaBridge 175:b96e65c34a4d 190 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 191 if (obj->serial.dma_chn_id_tx != DMA_ERROR_OUT_OF_CHANNELS) {
AnnaBridge 175:b96e65c34a4d 192 dma_channel_free(obj->serial.dma_chn_id_tx);
AnnaBridge 175:b96e65c34a4d 193 obj->serial.dma_chn_id_tx = DMA_ERROR_OUT_OF_CHANNELS;
AnnaBridge 175:b96e65c34a4d 194 }
AnnaBridge 175:b96e65c34a4d 195 if (obj->serial.dma_chn_id_rx != DMA_ERROR_OUT_OF_CHANNELS) {
AnnaBridge 175:b96e65c34a4d 196 dma_channel_free(obj->serial.dma_chn_id_rx);
AnnaBridge 175:b96e65c34a4d 197 obj->serial.dma_chn_id_rx = DMA_ERROR_OUT_OF_CHANNELS;
AnnaBridge 175:b96e65c34a4d 198 }
AnnaBridge 175:b96e65c34a4d 199 #endif
AnnaBridge 175:b96e65c34a4d 200
AnnaBridge 175:b96e65c34a4d 201 UART_Close((UART_T *) NU_MODBASE(obj->serial.uart));
AnnaBridge 175:b96e65c34a4d 202
AnnaBridge 175:b96e65c34a4d 203 UART_DISABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), (UART_IER_RDA_IE_Msk | UART_IER_THRE_IE_Msk | UART_IER_RTO_IE_Msk));
AnnaBridge 175:b96e65c34a4d 204 NVIC_DisableIRQ(modinit->irq_n);
AnnaBridge 175:b96e65c34a4d 205
AnnaBridge 175:b96e65c34a4d 206 // Disable IP clock
AnnaBridge 175:b96e65c34a4d 207 CLK_DisableModuleClock(modinit->clkidx);
AnnaBridge 175:b96e65c34a4d 208 }
AnnaBridge 175:b96e65c34a4d 209
AnnaBridge 175:b96e65c34a4d 210 if (var->obj == obj) {
AnnaBridge 175:b96e65c34a4d 211 var->obj = NULL;
AnnaBridge 175:b96e65c34a4d 212 }
AnnaBridge 175:b96e65c34a4d 213
AnnaBridge 175:b96e65c34a4d 214 if (obj->serial.uart == STDIO_UART) {
AnnaBridge 175:b96e65c34a4d 215 stdio_uart_inited = 0;
AnnaBridge 175:b96e65c34a4d 216 }
AnnaBridge 175:b96e65c34a4d 217
AnnaBridge 175:b96e65c34a4d 218 if (! var->ref_cnt) {
AnnaBridge 175:b96e65c34a4d 219 // Mark this module to be deinited.
AnnaBridge 175:b96e65c34a4d 220 int i = modinit - uart_modinit_tab;
AnnaBridge 175:b96e65c34a4d 221 uart_modinit_mask &= ~(1 << i);
AnnaBridge 175:b96e65c34a4d 222 }
AnnaBridge 175:b96e65c34a4d 223 }
AnnaBridge 175:b96e65c34a4d 224
AnnaBridge 175:b96e65c34a4d 225 void serial_baud(serial_t *obj, int baudrate) {
AnnaBridge 175:b96e65c34a4d 226 // Flush Tx FIFO. Otherwise, output data may get lost on this change.
AnnaBridge 175:b96e65c34a4d 227 while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
AnnaBridge 175:b96e65c34a4d 228
AnnaBridge 175:b96e65c34a4d 229 obj->serial.baudrate = baudrate;
AnnaBridge 175:b96e65c34a4d 230 UART_Open((UART_T *) NU_MODBASE(obj->serial.uart), baudrate);
AnnaBridge 175:b96e65c34a4d 231 }
AnnaBridge 175:b96e65c34a4d 232
AnnaBridge 175:b96e65c34a4d 233 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
AnnaBridge 175:b96e65c34a4d 234 // Flush Tx FIFO. Otherwise, output data may get lost on this change.
AnnaBridge 175:b96e65c34a4d 235 while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
AnnaBridge 175:b96e65c34a4d 236
AnnaBridge 175:b96e65c34a4d 237 // TODO: Assert for not supported parity and data bits
AnnaBridge 175:b96e65c34a4d 238 obj->serial.databits = data_bits;
AnnaBridge 175:b96e65c34a4d 239 obj->serial.parity = parity;
AnnaBridge 175:b96e65c34a4d 240 obj->serial.stopbits = stop_bits;
AnnaBridge 175:b96e65c34a4d 241
AnnaBridge 175:b96e65c34a4d 242 uint32_t databits_intern = (data_bits == 5) ? UART_WORD_LEN_5 :
AnnaBridge 175:b96e65c34a4d 243 (data_bits == 6) ? UART_WORD_LEN_6 :
AnnaBridge 175:b96e65c34a4d 244 (data_bits == 7) ? UART_WORD_LEN_7 :
AnnaBridge 175:b96e65c34a4d 245 UART_WORD_LEN_8;
AnnaBridge 175:b96e65c34a4d 246 uint32_t parity_intern = (parity == ParityOdd || parity == ParityForced1) ? UART_PARITY_ODD :
AnnaBridge 175:b96e65c34a4d 247 (parity == ParityEven || parity == ParityForced0) ? UART_PARITY_EVEN :
AnnaBridge 175:b96e65c34a4d 248 UART_PARITY_NONE;
AnnaBridge 175:b96e65c34a4d 249 uint32_t stopbits_intern = (stop_bits == 2) ? UART_STOP_BIT_2 : UART_STOP_BIT_1;
AnnaBridge 175:b96e65c34a4d 250 UART_SetLine_Config((UART_T *) NU_MODBASE(obj->serial.uart),
AnnaBridge 175:b96e65c34a4d 251 0, // Don't change baudrate
AnnaBridge 175:b96e65c34a4d 252 databits_intern,
AnnaBridge 175:b96e65c34a4d 253 parity_intern,
AnnaBridge 175:b96e65c34a4d 254 stopbits_intern);
AnnaBridge 175:b96e65c34a4d 255 }
AnnaBridge 175:b96e65c34a4d 256
AnnaBridge 175:b96e65c34a4d 257 #if DEVICE_SERIAL_FC
AnnaBridge 175:b96e65c34a4d 258
AnnaBridge 175:b96e65c34a4d 259 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
AnnaBridge 175:b96e65c34a4d 260 {
AnnaBridge 175:b96e65c34a4d 261 UART_T *uart_base = (UART_T *) NU_MODBASE(obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 262
AnnaBridge 175:b96e65c34a4d 263 // First, disable flow control completely.
AnnaBridge 175:b96e65c34a4d 264 UART_DisableFlowCtrl(uart_base);
AnnaBridge 175:b96e65c34a4d 265
AnnaBridge 175:b96e65c34a4d 266 if ((type == FlowControlRTS || type == FlowControlRTSCTS) && rxflow != NC) {
AnnaBridge 175:b96e65c34a4d 267 // Check if RTS pin matches.
AnnaBridge 175:b96e65c34a4d 268 uint32_t uart_rts = pinmap_peripheral(rxflow, PinMap_UART_RTS);
AnnaBridge 175:b96e65c34a4d 269 MBED_ASSERT(uart_rts == obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 270 // Enable the pin for RTS function
AnnaBridge 175:b96e65c34a4d 271 pinmap_pinout(rxflow, PinMap_UART_RTS);
AnnaBridge 175:b96e65c34a4d 272 // nRTS pin output is low level active
AnnaBridge 175:b96e65c34a4d 273 uart_base->MCSR |= UART_MCSR_LEV_RTS_Msk;
AnnaBridge 175:b96e65c34a4d 274 // Set RTS Trigger Level as 8 bytes
AnnaBridge 175:b96e65c34a4d 275 uart_base->TLCTL = (uart_base->TLCTL & ~UART_TLCTL_RTS_TRI_LEV_Msk) | UART_TLCTL_RTS_TRI_LEV_8BYTES;
AnnaBridge 175:b96e65c34a4d 276 // Set RX Trigger Level as 8 bytes
AnnaBridge 175:b96e65c34a4d 277 uart_base->TLCTL = (uart_base->TLCTL & ~UART_TLCTL_RFITL_Msk) | UART_TLCTL_RFITL_8BYTES;
AnnaBridge 175:b96e65c34a4d 278 // Enable RTS
AnnaBridge 175:b96e65c34a4d 279 uart_base->CTL |= UART_CTL_AUTO_RTS_EN_Msk;
AnnaBridge 175:b96e65c34a4d 280 }
AnnaBridge 175:b96e65c34a4d 281
AnnaBridge 175:b96e65c34a4d 282 if ((type == FlowControlCTS || type == FlowControlRTSCTS) && txflow != NC) {
AnnaBridge 175:b96e65c34a4d 283 // Check if CTS pin matches.
AnnaBridge 175:b96e65c34a4d 284 uint32_t uart_cts = pinmap_peripheral(txflow, PinMap_UART_CTS);
AnnaBridge 175:b96e65c34a4d 285 MBED_ASSERT(uart_cts == obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 286 // Enable the pin for CTS function
AnnaBridge 175:b96e65c34a4d 287 pinmap_pinout(txflow, PinMap_UART_CTS);
AnnaBridge 175:b96e65c34a4d 288 // nCTS pin input is low level active
AnnaBridge 175:b96e65c34a4d 289 uart_base->MCSR |= UART_MCSR_LEV_CTS_Msk;
AnnaBridge 175:b96e65c34a4d 290 // Enable CTS
AnnaBridge 175:b96e65c34a4d 291 uart_base->CTL |= UART_CTL_AUTO_CTS_EN_Msk;
AnnaBridge 175:b96e65c34a4d 292 }
AnnaBridge 175:b96e65c34a4d 293 }
AnnaBridge 175:b96e65c34a4d 294
AnnaBridge 175:b96e65c34a4d 295 #endif //DEVICE_SERIAL_FC
AnnaBridge 175:b96e65c34a4d 296
AnnaBridge 175:b96e65c34a4d 297 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
AnnaBridge 175:b96e65c34a4d 298 {
AnnaBridge 175:b96e65c34a4d 299 // Flush Tx FIFO. Otherwise, output data may get lost on this change.
AnnaBridge 175:b96e65c34a4d 300 while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
AnnaBridge 175:b96e65c34a4d 301
AnnaBridge 175:b96e65c34a4d 302 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 303 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 304 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 305
AnnaBridge 175:b96e65c34a4d 306 obj->serial.irq_handler = (uint32_t) handler;
AnnaBridge 175:b96e65c34a4d 307 obj->serial.irq_id = id;
AnnaBridge 175:b96e65c34a4d 308
AnnaBridge 175:b96e65c34a4d 309 // Restore sync-mode vector
AnnaBridge 175:b96e65c34a4d 310 obj->serial.async_en = 0;
AnnaBridge 175:b96e65c34a4d 311 }
AnnaBridge 175:b96e65c34a4d 312
AnnaBridge 175:b96e65c34a4d 313 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
AnnaBridge 175:b96e65c34a4d 314 {
AnnaBridge 175:b96e65c34a4d 315 obj->serial.irq_en = enable;
AnnaBridge 175:b96e65c34a4d 316 serial_enable_interrupt(obj, irq, enable);
AnnaBridge 175:b96e65c34a4d 317 }
AnnaBridge 175:b96e65c34a4d 318
AnnaBridge 175:b96e65c34a4d 319 int serial_getc(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 320 {
AnnaBridge 175:b96e65c34a4d 321 // TODO: Fix every byte access requires accompaniment of one interrupt. This has side effect of performance degradation.
AnnaBridge 175:b96e65c34a4d 322 while (! serial_readable(obj));
AnnaBridge 175:b96e65c34a4d 323 int c = UART_READ(((UART_T *) NU_MODBASE(obj->serial.uart)));
AnnaBridge 175:b96e65c34a4d 324
AnnaBridge 175:b96e65c34a4d 325 // NOTE: On Nuvoton targets, no H/W IRQ to match TxIrq/RxIrq.
AnnaBridge 175:b96e65c34a4d 326 // Simulation of TxIrq/RxIrq requires the call to Serial::putc()/Serial::getc() respectively.
AnnaBridge 175:b96e65c34a4d 327 if (obj->serial.ier_msk & (UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk)) {
AnnaBridge 175:b96e65c34a4d 328 UART_ENABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), (UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk));
AnnaBridge 175:b96e65c34a4d 329 }
AnnaBridge 175:b96e65c34a4d 330
AnnaBridge 175:b96e65c34a4d 331 return c;
AnnaBridge 175:b96e65c34a4d 332 }
AnnaBridge 175:b96e65c34a4d 333
AnnaBridge 175:b96e65c34a4d 334 void serial_putc(serial_t *obj, int c)
AnnaBridge 175:b96e65c34a4d 335 {
AnnaBridge 175:b96e65c34a4d 336 // TODO: Fix every byte access requires accompaniment of one interrupt. This has side effect of performance degradation.
AnnaBridge 175:b96e65c34a4d 337 while (! serial_writable(obj));
AnnaBridge 175:b96e65c34a4d 338 UART_WRITE(((UART_T *) NU_MODBASE(obj->serial.uart)), c);
AnnaBridge 175:b96e65c34a4d 339
AnnaBridge 175:b96e65c34a4d 340 // NOTE: On Nuvoton targets, no H/W IRQ to match TxIrq/RxIrq.
AnnaBridge 175:b96e65c34a4d 341 // Simulation of TxIrq/RxIrq requires the call to Serial::putc()/Serial::getc() respectively.
AnnaBridge 175:b96e65c34a4d 342 if (obj->serial.ier_msk & UART_IER_THRE_IE_Msk) {
AnnaBridge 175:b96e65c34a4d 343 UART_ENABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), UART_IER_THRE_IE_Msk);
AnnaBridge 175:b96e65c34a4d 344 }
AnnaBridge 175:b96e65c34a4d 345 }
AnnaBridge 175:b96e65c34a4d 346
AnnaBridge 175:b96e65c34a4d 347 int serial_readable(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 348 {
AnnaBridge 175:b96e65c34a4d 349 return ! UART_GET_RX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart)));
AnnaBridge 175:b96e65c34a4d 350 }
AnnaBridge 175:b96e65c34a4d 351
AnnaBridge 175:b96e65c34a4d 352 int serial_writable(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 353 {
AnnaBridge 175:b96e65c34a4d 354 return ! UART_IS_TX_FULL(((UART_T *) NU_MODBASE(obj->serial.uart)));
AnnaBridge 175:b96e65c34a4d 355 }
AnnaBridge 175:b96e65c34a4d 356
AnnaBridge 175:b96e65c34a4d 357 void serial_pinout_tx(PinName tx)
AnnaBridge 175:b96e65c34a4d 358 {
AnnaBridge 175:b96e65c34a4d 359 pinmap_pinout(tx, PinMap_UART_TX);
AnnaBridge 175:b96e65c34a4d 360 }
AnnaBridge 175:b96e65c34a4d 361
AnnaBridge 175:b96e65c34a4d 362 void serial_break_set(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 363 {
AnnaBridge 175:b96e65c34a4d 364 ((UART_T *) NU_MODBASE(obj->serial.uart))->TLCTL |= UART_TLCTL_BCB_Msk;
AnnaBridge 175:b96e65c34a4d 365 }
AnnaBridge 175:b96e65c34a4d 366
AnnaBridge 175:b96e65c34a4d 367 void serial_break_clear(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 368 {
AnnaBridge 175:b96e65c34a4d 369 ((UART_T *) NU_MODBASE(obj->serial.uart))->TLCTL &= ~UART_TLCTL_BCB_Msk;
AnnaBridge 175:b96e65c34a4d 370 }
AnnaBridge 175:b96e65c34a4d 371
AnnaBridge 175:b96e65c34a4d 372 void UART0_IRQHandler(void)
AnnaBridge 175:b96e65c34a4d 373 {
AnnaBridge 175:b96e65c34a4d 374 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 375 if (uart0_var.obj->serial.async_en)
AnnaBridge 175:b96e65c34a4d 376 uart_irq_async(uart0_var.obj);
AnnaBridge 175:b96e65c34a4d 377 else
AnnaBridge 175:b96e65c34a4d 378 #endif
AnnaBridge 175:b96e65c34a4d 379 uart_irq(uart0_var.obj);
AnnaBridge 175:b96e65c34a4d 380 }
AnnaBridge 175:b96e65c34a4d 381
AnnaBridge 175:b96e65c34a4d 382 void UART1_IRQHandler(void)
AnnaBridge 175:b96e65c34a4d 383 {
AnnaBridge 175:b96e65c34a4d 384 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 385 if (uart1_var.obj->serial.async_en)
AnnaBridge 175:b96e65c34a4d 386 uart_irq_async(uart1_var.obj);
AnnaBridge 175:b96e65c34a4d 387 else
AnnaBridge 175:b96e65c34a4d 388 #endif
AnnaBridge 175:b96e65c34a4d 389 uart_irq(uart1_var.obj);
AnnaBridge 175:b96e65c34a4d 390 }
AnnaBridge 175:b96e65c34a4d 391
AnnaBridge 175:b96e65c34a4d 392 static void uart_irq(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 393 {
AnnaBridge 175:b96e65c34a4d 394 UART_T *uart_base = (UART_T *) NU_MODBASE(obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 395
AnnaBridge 175:b96e65c34a4d 396 if (uart_base->ISR & (UART_ISR_RDA_IS_Msk | UART_ISR_RTO_IS_Msk)) {
AnnaBridge 175:b96e65c34a4d 397 // Simulate clear of the interrupt flag. Temporarily disable the interrupt here and to be recovered on next read.
AnnaBridge 175:b96e65c34a4d 398 UART_DISABLE_INT(uart_base, (UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk));
AnnaBridge 175:b96e65c34a4d 399 if (obj->serial.irq_handler) {
AnnaBridge 175:b96e65c34a4d 400 ((uart_irq_handler) obj->serial.irq_handler)(obj->serial.irq_id, RxIrq);
AnnaBridge 175:b96e65c34a4d 401 }
AnnaBridge 175:b96e65c34a4d 402 }
AnnaBridge 175:b96e65c34a4d 403
AnnaBridge 175:b96e65c34a4d 404 if (uart_base->ISR & UART_ISR_THRE_IS_Msk) {
AnnaBridge 175:b96e65c34a4d 405 // Simulate clear of the interrupt flag. Temporarily disable the interrupt here and to be recovered on next write.
AnnaBridge 175:b96e65c34a4d 406 UART_DISABLE_INT(uart_base, UART_IER_THRE_IE_Msk);
AnnaBridge 175:b96e65c34a4d 407 if (obj->serial.irq_handler) {
AnnaBridge 175:b96e65c34a4d 408 ((uart_irq_handler) obj->serial.irq_handler)(obj->serial.irq_id, TxIrq);
AnnaBridge 175:b96e65c34a4d 409 }
AnnaBridge 175:b96e65c34a4d 410 }
AnnaBridge 175:b96e65c34a4d 411
AnnaBridge 175:b96e65c34a4d 412 // NOTE: Ignore all other interrupt flags. Clear them. Otherwise, program will get stuck in interrupt.
AnnaBridge 175:b96e65c34a4d 413 uart_base->ISR = uart_base->ISR;
AnnaBridge 175:b96e65c34a4d 414 uart_base->FSR = uart_base->FSR;
AnnaBridge 175:b96e65c34a4d 415 }
AnnaBridge 175:b96e65c34a4d 416
AnnaBridge 175:b96e65c34a4d 417
AnnaBridge 175:b96e65c34a4d 418 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 419 int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, uint8_t tx_width, uint32_t handler, uint32_t event, DMAUsage hint)
AnnaBridge 175:b96e65c34a4d 420 {
AnnaBridge 175:b96e65c34a4d 421 MBED_ASSERT(tx_width == 8 || tx_width == 16 || tx_width == 32);
AnnaBridge 175:b96e65c34a4d 422
AnnaBridge 175:b96e65c34a4d 423 obj->serial.dma_usage_tx = hint;
AnnaBridge 175:b96e65c34a4d 424 serial_check_dma_usage(&obj->serial.dma_usage_tx, &obj->serial.dma_chn_id_tx);
AnnaBridge 175:b96e65c34a4d 425
AnnaBridge 175:b96e65c34a4d 426 // UART IRQ is necessary for both interrupt way and DMA way
AnnaBridge 175:b96e65c34a4d 427 serial_tx_enable_event(obj, event, 1);
AnnaBridge 175:b96e65c34a4d 428 serial_tx_buffer_set(obj, tx, tx_length, tx_width);
AnnaBridge 175:b96e65c34a4d 429
AnnaBridge 175:b96e65c34a4d 430 int n_word = 0;
AnnaBridge 175:b96e65c34a4d 431 if (obj->serial.dma_usage_tx == DMA_USAGE_NEVER) {
AnnaBridge 175:b96e65c34a4d 432 // Interrupt way
AnnaBridge 175:b96e65c34a4d 433 n_word = serial_write_async(obj);
AnnaBridge 175:b96e65c34a4d 434 serial_tx_enable_interrupt(obj, handler, 1);
AnnaBridge 175:b96e65c34a4d 435 } else {
AnnaBridge 175:b96e65c34a4d 436 // DMA way
AnnaBridge 175:b96e65c34a4d 437 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 438 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 439 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 440
AnnaBridge 175:b96e65c34a4d 441 dma_enable(obj->serial.dma_chn_id_tx, 1); // Enable this DMA channel
AnnaBridge 175:b96e65c34a4d 442 PDMA_SetTransferMode(obj->serial.dma_chn_id_tx,
AnnaBridge 175:b96e65c34a4d 443 ((struct nu_uart_var *) modinit->var)->pdma_perp_tx, // Peripheral connected to this PDMA
AnnaBridge 175:b96e65c34a4d 444 0, // Scatter-gather disabled
AnnaBridge 175:b96e65c34a4d 445 0); // Scatter-gather descriptor address
AnnaBridge 175:b96e65c34a4d 446 PDMA_SetTransferCnt(obj->serial.dma_chn_id_tx,
AnnaBridge 175:b96e65c34a4d 447 (tx_width == 8) ? PDMA_WIDTH_8 : (tx_width == 16) ? PDMA_WIDTH_16 : PDMA_WIDTH_32,
AnnaBridge 175:b96e65c34a4d 448 tx_length);
AnnaBridge 175:b96e65c34a4d 449 PDMA_SetTransferAddr(obj->serial.dma_chn_id_tx,
AnnaBridge 175:b96e65c34a4d 450 (uint32_t) tx, // NOTE:
AnnaBridge 175:b96e65c34a4d 451 // NUC472: End of source address
AnnaBridge 175:b96e65c34a4d 452 // M451: Start of source address
AnnaBridge 175:b96e65c34a4d 453 PDMA_SAR_INC, // Source address incremental
AnnaBridge 175:b96e65c34a4d 454 (uint32_t) NU_MODBASE(obj->serial.uart), // Destination address
AnnaBridge 175:b96e65c34a4d 455 PDMA_DAR_FIX); // Destination address fixed
AnnaBridge 175:b96e65c34a4d 456 PDMA_EnableInt(obj->serial.dma_chn_id_tx,
AnnaBridge 175:b96e65c34a4d 457 PDMA_IER_TD_IE_Msk); // Interrupt type
AnnaBridge 175:b96e65c34a4d 458 // Register DMA event handler
AnnaBridge 175:b96e65c34a4d 459 dma_set_handler(obj->serial.dma_chn_id_tx, (uint32_t) uart_dma_handler_tx, (uint32_t) obj, DMA_EVENT_ALL);
AnnaBridge 175:b96e65c34a4d 460 serial_tx_enable_interrupt(obj, handler, 1);
AnnaBridge 175:b96e65c34a4d 461 PDMA_Trigger(obj->serial.dma_chn_id_tx);
AnnaBridge 175:b96e65c34a4d 462 ((UART_T *) NU_MODBASE(obj->serial.uart))->CTL |= UART_CTL_DMA_TX_EN_Msk; // Start DMA transfer
AnnaBridge 175:b96e65c34a4d 463 }
AnnaBridge 175:b96e65c34a4d 464
AnnaBridge 175:b96e65c34a4d 465 return n_word;
AnnaBridge 175:b96e65c34a4d 466 }
AnnaBridge 175:b96e65c34a4d 467
AnnaBridge 175:b96e65c34a4d 468 void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_width, uint32_t handler, uint32_t event, uint8_t char_match, DMAUsage hint)
AnnaBridge 175:b96e65c34a4d 469 {
AnnaBridge 175:b96e65c34a4d 470 MBED_ASSERT(rx_width == 8 || rx_width == 16 || rx_width == 32);
AnnaBridge 175:b96e65c34a4d 471
AnnaBridge 175:b96e65c34a4d 472 obj->serial.dma_usage_rx = hint;
AnnaBridge 175:b96e65c34a4d 473 serial_check_dma_usage(&obj->serial.dma_usage_rx, &obj->serial.dma_chn_id_rx);
AnnaBridge 175:b96e65c34a4d 474 // DMA doesn't support char match, so fall back to IRQ if it is requested.
AnnaBridge 175:b96e65c34a4d 475 if (obj->serial.dma_usage_rx != DMA_USAGE_NEVER &&
AnnaBridge 175:b96e65c34a4d 476 (event & SERIAL_EVENT_RX_CHARACTER_MATCH) &&
AnnaBridge 175:b96e65c34a4d 477 char_match != SERIAL_RESERVED_CHAR_MATCH) {
AnnaBridge 175:b96e65c34a4d 478 obj->serial.dma_usage_rx = DMA_USAGE_NEVER;
AnnaBridge 175:b96e65c34a4d 479 dma_channel_free(obj->serial.dma_chn_id_rx);
AnnaBridge 175:b96e65c34a4d 480 obj->serial.dma_chn_id_rx = DMA_ERROR_OUT_OF_CHANNELS;
AnnaBridge 175:b96e65c34a4d 481 }
AnnaBridge 175:b96e65c34a4d 482
AnnaBridge 175:b96e65c34a4d 483 // UART IRQ is necessary for both interrupt way and DMA way
AnnaBridge 175:b96e65c34a4d 484 serial_rx_enable_event(obj, event, 1);
AnnaBridge 175:b96e65c34a4d 485 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
AnnaBridge 175:b96e65c34a4d 486 serial_rx_set_char_match(obj, char_match);
AnnaBridge 175:b96e65c34a4d 487
AnnaBridge 175:b96e65c34a4d 488 if (obj->serial.dma_usage_rx == DMA_USAGE_NEVER) {
AnnaBridge 175:b96e65c34a4d 489 // Interrupt way
AnnaBridge 175:b96e65c34a4d 490 serial_rx_enable_interrupt(obj, handler, 1);
AnnaBridge 175:b96e65c34a4d 491 } else {
AnnaBridge 175:b96e65c34a4d 492 // DMA way
AnnaBridge 175:b96e65c34a4d 493 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 494 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 495 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 496
AnnaBridge 175:b96e65c34a4d 497 dma_enable(obj->serial.dma_chn_id_rx, 1); // Enable this DMA channel
AnnaBridge 175:b96e65c34a4d 498 PDMA_SetTransferMode(obj->serial.dma_chn_id_rx,
AnnaBridge 175:b96e65c34a4d 499 ((struct nu_uart_var *) modinit->var)->pdma_perp_rx, // Peripheral connected to this PDMA
AnnaBridge 175:b96e65c34a4d 500 0, // Scatter-gather disabled
AnnaBridge 175:b96e65c34a4d 501 0); // Scatter-gather descriptor address
AnnaBridge 175:b96e65c34a4d 502 PDMA_SetTransferCnt(obj->serial.dma_chn_id_rx,
AnnaBridge 175:b96e65c34a4d 503 (rx_width == 8) ? PDMA_WIDTH_8 : (rx_width == 16) ? PDMA_WIDTH_16 : PDMA_WIDTH_32,
AnnaBridge 175:b96e65c34a4d 504 rx_length);
AnnaBridge 175:b96e65c34a4d 505 PDMA_SetTransferAddr(obj->serial.dma_chn_id_rx,
AnnaBridge 175:b96e65c34a4d 506 (uint32_t) NU_MODBASE(obj->serial.uart), // Source address
AnnaBridge 175:b96e65c34a4d 507 PDMA_SAR_FIX, // Source address fixed
AnnaBridge 175:b96e65c34a4d 508 (uint32_t) rx, // NOTE:
AnnaBridge 175:b96e65c34a4d 509 // NUC472: End of destination address
AnnaBridge 175:b96e65c34a4d 510 // M451: Start of destination address
AnnaBridge 175:b96e65c34a4d 511 PDMA_DAR_INC); // Destination address incremental
AnnaBridge 175:b96e65c34a4d 512 PDMA_EnableInt(obj->serial.dma_chn_id_rx,
AnnaBridge 175:b96e65c34a4d 513 PDMA_IER_TD_IE_Msk); // Interrupt type
AnnaBridge 175:b96e65c34a4d 514 // Register DMA event handler
AnnaBridge 175:b96e65c34a4d 515 dma_set_handler(obj->serial.dma_chn_id_rx, (uint32_t) uart_dma_handler_rx, (uint32_t) obj, DMA_EVENT_ALL);
AnnaBridge 175:b96e65c34a4d 516 serial_rx_enable_interrupt(obj, handler, 1);
AnnaBridge 175:b96e65c34a4d 517 PDMA_Trigger(obj->serial.dma_chn_id_rx);
AnnaBridge 175:b96e65c34a4d 518 ((UART_T *) NU_MODBASE(obj->serial.uart))->CTL |= UART_CTL_DMA_RX_EN_Msk; // Start DMA transfer
AnnaBridge 175:b96e65c34a4d 519 }
AnnaBridge 175:b96e65c34a4d 520 }
AnnaBridge 175:b96e65c34a4d 521
AnnaBridge 175:b96e65c34a4d 522 void serial_tx_abort_asynch(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 523 {
AnnaBridge 175:b96e65c34a4d 524 // Flush Tx FIFO. Otherwise, output data may get lost on this change.
AnnaBridge 175:b96e65c34a4d 525 while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
AnnaBridge 175:b96e65c34a4d 526
AnnaBridge 175:b96e65c34a4d 527 if (obj->serial.dma_usage_tx != DMA_USAGE_NEVER) {
AnnaBridge 175:b96e65c34a4d 528 if (obj->serial.dma_chn_id_tx != DMA_ERROR_OUT_OF_CHANNELS) {
AnnaBridge 175:b96e65c34a4d 529 PDMA_DisableInt(obj->serial.dma_chn_id_tx, PDMA_IER_TD_IE_Msk);
AnnaBridge 175:b96e65c34a4d 530 // NOTE: On NUC472, next PDMA transfer will fail with PDMA_STOP() called.
AnnaBridge 175:b96e65c34a4d 531 dma_enable(obj->serial.dma_chn_id_tx, 0);
AnnaBridge 175:b96e65c34a4d 532 }
AnnaBridge 175:b96e65c34a4d 533 ((UART_T *) NU_MODBASE(obj->serial.uart))->CTL &= ~UART_CTL_DMA_TX_EN_Msk;
AnnaBridge 175:b96e65c34a4d 534 }
AnnaBridge 175:b96e65c34a4d 535
AnnaBridge 175:b96e65c34a4d 536 // Necessary for both interrupt way and DMA way
AnnaBridge 175:b96e65c34a4d 537 serial_enable_interrupt(obj, TxIrq, 0);
AnnaBridge 175:b96e65c34a4d 538 serial_rollback_interrupt(obj, TxIrq);
AnnaBridge 175:b96e65c34a4d 539 }
AnnaBridge 175:b96e65c34a4d 540
AnnaBridge 175:b96e65c34a4d 541 void serial_rx_abort_asynch(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 542 {
AnnaBridge 175:b96e65c34a4d 543 if (obj->serial.dma_usage_rx != DMA_USAGE_NEVER) {
AnnaBridge 175:b96e65c34a4d 544 if (obj->serial.dma_chn_id_rx != DMA_ERROR_OUT_OF_CHANNELS) {
AnnaBridge 175:b96e65c34a4d 545 PDMA_DisableInt(obj->serial.dma_chn_id_rx, PDMA_IER_TD_IE_Msk);
AnnaBridge 175:b96e65c34a4d 546 // NOTE: On NUC472, next PDMA transfer will fail with PDMA_STOP() called.
AnnaBridge 175:b96e65c34a4d 547 dma_enable(obj->serial.dma_chn_id_rx, 0);
AnnaBridge 175:b96e65c34a4d 548 }
AnnaBridge 175:b96e65c34a4d 549 ((UART_T *) NU_MODBASE(obj->serial.uart))->CTL &= ~UART_CTL_DMA_RX_EN_Msk;
AnnaBridge 175:b96e65c34a4d 550 }
AnnaBridge 175:b96e65c34a4d 551
AnnaBridge 175:b96e65c34a4d 552 // Necessary for both interrupt way and DMA way
AnnaBridge 175:b96e65c34a4d 553 serial_enable_interrupt(obj, RxIrq, 0);
AnnaBridge 175:b96e65c34a4d 554 serial_rollback_interrupt(obj, RxIrq);
AnnaBridge 175:b96e65c34a4d 555 }
AnnaBridge 175:b96e65c34a4d 556
AnnaBridge 175:b96e65c34a4d 557 uint8_t serial_tx_active(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 558 {
AnnaBridge 175:b96e65c34a4d 559 // NOTE: Judge by serial_is_irq_en(obj, TxIrq) doesn't work with sync/async modes interleaved. Change with TX FIFO empty flag.
AnnaBridge 175:b96e65c34a4d 560 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 561 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 562 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 563
AnnaBridge 175:b96e65c34a4d 564 return (obj->serial.async_en);
AnnaBridge 175:b96e65c34a4d 565 }
AnnaBridge 175:b96e65c34a4d 566
AnnaBridge 175:b96e65c34a4d 567 uint8_t serial_rx_active(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 568 {
AnnaBridge 175:b96e65c34a4d 569 // NOTE: Judge by serial_is_irq_en(obj, RxIrq) doesn't work with sync/async modes interleaved. Change with RX FIFO empty flag.
AnnaBridge 175:b96e65c34a4d 570 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 571 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 572 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 573
AnnaBridge 175:b96e65c34a4d 574 return (obj->serial.async_en);
AnnaBridge 175:b96e65c34a4d 575 }
AnnaBridge 175:b96e65c34a4d 576
AnnaBridge 175:b96e65c34a4d 577 int serial_irq_handler_asynch(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 578 {
AnnaBridge 175:b96e65c34a4d 579 int event_rx = 0;
AnnaBridge 175:b96e65c34a4d 580 int event_tx = 0;
AnnaBridge 175:b96e65c34a4d 581
AnnaBridge 175:b96e65c34a4d 582 // Necessary for both interrupt way and DMA way
AnnaBridge 175:b96e65c34a4d 583 if (serial_is_irq_en(obj, RxIrq)) {
AnnaBridge 175:b96e65c34a4d 584 event_rx = serial_rx_event_check(obj);
AnnaBridge 175:b96e65c34a4d 585 if (event_rx) {
AnnaBridge 175:b96e65c34a4d 586 serial_rx_abort_asynch(obj);
AnnaBridge 175:b96e65c34a4d 587 }
AnnaBridge 175:b96e65c34a4d 588 }
AnnaBridge 175:b96e65c34a4d 589
AnnaBridge 175:b96e65c34a4d 590 if (serial_is_irq_en(obj, TxIrq)) {
AnnaBridge 175:b96e65c34a4d 591 event_tx = serial_tx_event_check(obj);
AnnaBridge 175:b96e65c34a4d 592 if (event_tx) {
AnnaBridge 175:b96e65c34a4d 593 serial_tx_abort_asynch(obj);
AnnaBridge 175:b96e65c34a4d 594 }
AnnaBridge 175:b96e65c34a4d 595 }
AnnaBridge 175:b96e65c34a4d 596
AnnaBridge 175:b96e65c34a4d 597 return (obj->serial.event & (event_rx | event_tx));
AnnaBridge 175:b96e65c34a4d 598 }
AnnaBridge 175:b96e65c34a4d 599
AnnaBridge 175:b96e65c34a4d 600 static void uart_irq_async(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 601 {
AnnaBridge 175:b96e65c34a4d 602 if (serial_is_irq_en(obj, RxIrq)) {
AnnaBridge 175:b96e65c34a4d 603 (*obj->serial.irq_handler_rx_async)();
AnnaBridge 175:b96e65c34a4d 604 }
AnnaBridge 175:b96e65c34a4d 605 if (serial_is_irq_en(obj, TxIrq)) {
AnnaBridge 175:b96e65c34a4d 606 (*obj->serial.irq_handler_tx_async)();
AnnaBridge 175:b96e65c34a4d 607 }
AnnaBridge 175:b96e65c34a4d 608 }
AnnaBridge 175:b96e65c34a4d 609
AnnaBridge 175:b96e65c34a4d 610 static void serial_rx_set_char_match(serial_t *obj, uint8_t char_match)
AnnaBridge 175:b96e65c34a4d 611 {
AnnaBridge 175:b96e65c34a4d 612 obj->char_match = char_match;
AnnaBridge 175:b96e65c34a4d 613 obj->char_found = 0;
AnnaBridge 175:b96e65c34a4d 614 }
AnnaBridge 175:b96e65c34a4d 615
AnnaBridge 175:b96e65c34a4d 616 static void serial_tx_enable_event(serial_t *obj, int event, uint8_t enable)
AnnaBridge 175:b96e65c34a4d 617 {
AnnaBridge 175:b96e65c34a4d 618 obj->serial.event &= ~SERIAL_EVENT_TX_MASK;
AnnaBridge 175:b96e65c34a4d 619 obj->serial.event |= (event & SERIAL_EVENT_TX_MASK);
AnnaBridge 175:b96e65c34a4d 620
AnnaBridge 175:b96e65c34a4d 621 }
AnnaBridge 175:b96e65c34a4d 622
AnnaBridge 175:b96e65c34a4d 623 static void serial_rx_enable_event(serial_t *obj, int event, uint8_t enable)
AnnaBridge 175:b96e65c34a4d 624 {
AnnaBridge 175:b96e65c34a4d 625 obj->serial.event &= ~SERIAL_EVENT_RX_MASK;
AnnaBridge 175:b96e65c34a4d 626 obj->serial.event |= (event & SERIAL_EVENT_RX_MASK);
AnnaBridge 175:b96e65c34a4d 627
AnnaBridge 175:b96e65c34a4d 628 if (event & SERIAL_EVENT_RX_FRAMING_ERROR) {
AnnaBridge 175:b96e65c34a4d 629 UART_ENABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), UART_IER_RLS_IE_Msk);
AnnaBridge 175:b96e65c34a4d 630 }
AnnaBridge 175:b96e65c34a4d 631 if (event & SERIAL_EVENT_RX_PARITY_ERROR) {
AnnaBridge 175:b96e65c34a4d 632 UART_ENABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), UART_IER_RLS_IE_Msk);
AnnaBridge 175:b96e65c34a4d 633 }
AnnaBridge 175:b96e65c34a4d 634 if (event & SERIAL_EVENT_RX_OVERFLOW) {
AnnaBridge 175:b96e65c34a4d 635 UART_ENABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), UART_IER_BUF_ERR_IE_Msk);
AnnaBridge 175:b96e65c34a4d 636 }
AnnaBridge 175:b96e65c34a4d 637 }
AnnaBridge 175:b96e65c34a4d 638
AnnaBridge 175:b96e65c34a4d 639 static int serial_is_tx_complete(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 640 {
AnnaBridge 175:b96e65c34a4d 641 // NOTE: Exclude tx fifo empty check due to no such interrupt on DMA way
AnnaBridge 175:b96e65c34a4d 642 return (obj->tx_buff.pos == obj->tx_buff.length);
AnnaBridge 175:b96e65c34a4d 643 }
AnnaBridge 175:b96e65c34a4d 644
AnnaBridge 175:b96e65c34a4d 645 static int serial_is_rx_complete(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 646 {
AnnaBridge 175:b96e65c34a4d 647 return (obj->rx_buff.pos == obj->rx_buff.length);
AnnaBridge 175:b96e65c34a4d 648 }
AnnaBridge 175:b96e65c34a4d 649
AnnaBridge 175:b96e65c34a4d 650 static uint32_t serial_tx_event_check(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 651 {
AnnaBridge 175:b96e65c34a4d 652 UART_T *uart_base = (UART_T *) NU_MODBASE(obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 653
AnnaBridge 175:b96e65c34a4d 654 if (uart_base->ISR & UART_ISR_THRE_IS_Msk) {
AnnaBridge 175:b96e65c34a4d 655 // Simulate clear of the interrupt flag. Temporarily disable the interrupt here and to be recovered on next write.
AnnaBridge 175:b96e65c34a4d 656 UART_DISABLE_INT(uart_base, UART_IER_THRE_IE_Msk);
AnnaBridge 175:b96e65c34a4d 657 }
AnnaBridge 175:b96e65c34a4d 658
AnnaBridge 175:b96e65c34a4d 659 uint32_t event = 0;
AnnaBridge 175:b96e65c34a4d 660
AnnaBridge 175:b96e65c34a4d 661 if (obj->serial.dma_usage_tx == DMA_USAGE_NEVER) {
AnnaBridge 175:b96e65c34a4d 662 serial_write_async(obj);
AnnaBridge 175:b96e65c34a4d 663 }
AnnaBridge 175:b96e65c34a4d 664
AnnaBridge 175:b96e65c34a4d 665 if (serial_is_tx_complete(obj)) {
AnnaBridge 175:b96e65c34a4d 666 event |= SERIAL_EVENT_TX_COMPLETE;
AnnaBridge 175:b96e65c34a4d 667 }
AnnaBridge 175:b96e65c34a4d 668
AnnaBridge 175:b96e65c34a4d 669 return event;
AnnaBridge 175:b96e65c34a4d 670 }
AnnaBridge 175:b96e65c34a4d 671
AnnaBridge 175:b96e65c34a4d 672 static uint32_t serial_rx_event_check(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 673 {
AnnaBridge 175:b96e65c34a4d 674 UART_T *uart_base = (UART_T *) NU_MODBASE(obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 675
AnnaBridge 175:b96e65c34a4d 676 if (uart_base->ISR & (UART_ISR_RDA_IS_Msk | UART_ISR_RTO_IS_Msk)) {
AnnaBridge 175:b96e65c34a4d 677 // Simulate clear of the interrupt flag. Temporarily disable the interrupt here and to be recovered on next read.
AnnaBridge 175:b96e65c34a4d 678 UART_DISABLE_INT(uart_base, (UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk));
AnnaBridge 175:b96e65c34a4d 679 }
AnnaBridge 175:b96e65c34a4d 680
AnnaBridge 175:b96e65c34a4d 681 uint32_t event = 0;
AnnaBridge 175:b96e65c34a4d 682
AnnaBridge 175:b96e65c34a4d 683 if (uart_base->FSR & UART_FSR_BI_F_Msk) {
AnnaBridge 175:b96e65c34a4d 684 uart_base->FSR = UART_FSR_BI_F_Msk;
AnnaBridge 175:b96e65c34a4d 685 }
AnnaBridge 175:b96e65c34a4d 686 if (uart_base->FSR & UART_FSR_FE_F_Msk) {
AnnaBridge 175:b96e65c34a4d 687 uart_base->FSR = UART_FSR_FE_F_Msk;
AnnaBridge 175:b96e65c34a4d 688 event |= SERIAL_EVENT_RX_FRAMING_ERROR;
AnnaBridge 175:b96e65c34a4d 689 }
AnnaBridge 175:b96e65c34a4d 690 if (uart_base->FSR & UART_FSR_PE_F_Msk) {
AnnaBridge 175:b96e65c34a4d 691 uart_base->FSR = UART_FSR_PE_F_Msk;
AnnaBridge 175:b96e65c34a4d 692 event |= SERIAL_EVENT_RX_PARITY_ERROR;
AnnaBridge 175:b96e65c34a4d 693 }
AnnaBridge 175:b96e65c34a4d 694
AnnaBridge 175:b96e65c34a4d 695 if (uart_base->FSR & UART_FSR_RX_OVER_F_Msk) {
AnnaBridge 175:b96e65c34a4d 696 uart_base->FSR = UART_FSR_RX_OVER_F_Msk;
AnnaBridge 175:b96e65c34a4d 697 event |= SERIAL_EVENT_RX_OVERFLOW;
AnnaBridge 175:b96e65c34a4d 698 }
AnnaBridge 175:b96e65c34a4d 699
AnnaBridge 175:b96e65c34a4d 700 if (obj->serial.dma_usage_rx == DMA_USAGE_NEVER) {
AnnaBridge 175:b96e65c34a4d 701 serial_read_async(obj);
AnnaBridge 175:b96e65c34a4d 702 }
AnnaBridge 175:b96e65c34a4d 703
AnnaBridge 175:b96e65c34a4d 704 if (serial_is_rx_complete(obj)) {
AnnaBridge 175:b96e65c34a4d 705 event |= SERIAL_EVENT_RX_COMPLETE;
AnnaBridge 175:b96e65c34a4d 706 }
AnnaBridge 175:b96e65c34a4d 707 if ((obj->char_match != SERIAL_RESERVED_CHAR_MATCH) && obj->char_found) {
AnnaBridge 175:b96e65c34a4d 708 event |= SERIAL_EVENT_RX_CHARACTER_MATCH;
AnnaBridge 175:b96e65c34a4d 709 // NOTE: Timing to reset char_found?
AnnaBridge 175:b96e65c34a4d 710 // by obj->char_found = 0;
AnnaBridge 175:b96e65c34a4d 711 }
AnnaBridge 175:b96e65c34a4d 712
AnnaBridge 175:b96e65c34a4d 713 return event;
AnnaBridge 175:b96e65c34a4d 714 }
AnnaBridge 175:b96e65c34a4d 715
AnnaBridge 175:b96e65c34a4d 716 static void uart_dma_handler_tx(uint32_t id, uint32_t event_dma)
AnnaBridge 175:b96e65c34a4d 717 {
AnnaBridge 175:b96e65c34a4d 718 serial_t *obj = (serial_t *) id;
AnnaBridge 175:b96e65c34a4d 719
AnnaBridge 175:b96e65c34a4d 720 // TODO: Pass this error to caller
AnnaBridge 175:b96e65c34a4d 721 if (event_dma & DMA_EVENT_ABORT) {
AnnaBridge 175:b96e65c34a4d 722 }
AnnaBridge 175:b96e65c34a4d 723 // Expect UART IRQ will catch this transfer done event
AnnaBridge 175:b96e65c34a4d 724 if (event_dma & DMA_EVENT_TRANSFER_DONE) {
AnnaBridge 175:b96e65c34a4d 725 obj->tx_buff.pos = obj->tx_buff.length;
AnnaBridge 175:b96e65c34a4d 726 }
AnnaBridge 175:b96e65c34a4d 727 // TODO: Pass this error to caller
AnnaBridge 175:b96e65c34a4d 728 if (event_dma & DMA_EVENT_TIMEOUT) {
AnnaBridge 175:b96e65c34a4d 729 }
AnnaBridge 175:b96e65c34a4d 730
AnnaBridge 175:b96e65c34a4d 731 uart_irq_async(obj);
AnnaBridge 175:b96e65c34a4d 732 }
AnnaBridge 175:b96e65c34a4d 733
AnnaBridge 175:b96e65c34a4d 734 static void uart_dma_handler_rx(uint32_t id, uint32_t event_dma)
AnnaBridge 175:b96e65c34a4d 735 {
AnnaBridge 175:b96e65c34a4d 736 serial_t *obj = (serial_t *) id;
AnnaBridge 175:b96e65c34a4d 737
AnnaBridge 175:b96e65c34a4d 738 // TODO: Pass this error to caller
AnnaBridge 175:b96e65c34a4d 739 if (event_dma & DMA_EVENT_ABORT) {
AnnaBridge 175:b96e65c34a4d 740 }
AnnaBridge 175:b96e65c34a4d 741 // Expect UART IRQ will catch this transfer done event
AnnaBridge 175:b96e65c34a4d 742 if (event_dma & DMA_EVENT_TRANSFER_DONE) {
AnnaBridge 175:b96e65c34a4d 743 obj->rx_buff.pos = obj->rx_buff.length;
AnnaBridge 175:b96e65c34a4d 744 }
AnnaBridge 175:b96e65c34a4d 745 // TODO: Pass this error to caller
AnnaBridge 175:b96e65c34a4d 746 if (event_dma & DMA_EVENT_TIMEOUT) {
AnnaBridge 175:b96e65c34a4d 747 }
AnnaBridge 175:b96e65c34a4d 748
AnnaBridge 175:b96e65c34a4d 749 uart_irq_async(obj);
AnnaBridge 175:b96e65c34a4d 750 }
AnnaBridge 175:b96e65c34a4d 751
AnnaBridge 175:b96e65c34a4d 752 static int serial_write_async(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 753 {
AnnaBridge 175:b96e65c34a4d 754 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 755 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 756 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 757
AnnaBridge 175:b96e65c34a4d 758 UART_T *uart_base = (UART_T *) NU_MODBASE(obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 759
AnnaBridge 175:b96e65c34a4d 760 uint32_t tx_fifo_max = ((struct nu_uart_var *) modinit->var)->fifo_size_tx;
AnnaBridge 175:b96e65c34a4d 761 uint32_t tx_fifo_busy = (uart_base->FSR & UART_FSR_TX_POINTER_F_Msk) >> UART_FSR_TX_POINTER_F_Pos;
AnnaBridge 175:b96e65c34a4d 762 if (uart_base->FSR & UART_FSR_TX_FULL_F_Msk) {
AnnaBridge 175:b96e65c34a4d 763 tx_fifo_busy = tx_fifo_max;
AnnaBridge 175:b96e65c34a4d 764 }
AnnaBridge 175:b96e65c34a4d 765 uint32_t tx_fifo_free = tx_fifo_max - tx_fifo_busy;
AnnaBridge 175:b96e65c34a4d 766 if (tx_fifo_free == 0) {
AnnaBridge 175:b96e65c34a4d 767 // Simulate clear of the interrupt flag
AnnaBridge 175:b96e65c34a4d 768 if (obj->serial.ier_msk & UART_IER_THRE_IE_Msk) {
AnnaBridge 175:b96e65c34a4d 769 UART_ENABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), UART_IER_THRE_IE_Msk);
AnnaBridge 175:b96e65c34a4d 770 }
AnnaBridge 175:b96e65c34a4d 771 return 0;
AnnaBridge 175:b96e65c34a4d 772 }
AnnaBridge 175:b96e65c34a4d 773
AnnaBridge 175:b96e65c34a4d 774 uint32_t bytes_per_word = obj->tx_buff.width / 8;
AnnaBridge 175:b96e65c34a4d 775
AnnaBridge 175:b96e65c34a4d 776 uint8_t *tx = (uint8_t *)(obj->tx_buff.buffer) + bytes_per_word * obj->tx_buff.pos;
AnnaBridge 175:b96e65c34a4d 777 int n_words = 0;
AnnaBridge 175:b96e65c34a4d 778 while (obj->tx_buff.pos < obj->tx_buff.length && tx_fifo_free >= bytes_per_word) {
AnnaBridge 175:b96e65c34a4d 779 switch (bytes_per_word) {
AnnaBridge 175:b96e65c34a4d 780 case 4:
AnnaBridge 175:b96e65c34a4d 781 UART_WRITE(((UART_T *) NU_MODBASE(obj->serial.uart)), *tx ++);
AnnaBridge 175:b96e65c34a4d 782 UART_WRITE(((UART_T *) NU_MODBASE(obj->serial.uart)), *tx ++);
AnnaBridge 175:b96e65c34a4d 783 case 2:
AnnaBridge 175:b96e65c34a4d 784 UART_WRITE(((UART_T *) NU_MODBASE(obj->serial.uart)), *tx ++);
AnnaBridge 175:b96e65c34a4d 785 case 1:
AnnaBridge 175:b96e65c34a4d 786 UART_WRITE(((UART_T *) NU_MODBASE(obj->serial.uart)), *tx ++);
AnnaBridge 175:b96e65c34a4d 787 }
AnnaBridge 175:b96e65c34a4d 788
AnnaBridge 175:b96e65c34a4d 789 n_words ++;
AnnaBridge 175:b96e65c34a4d 790 tx_fifo_free -= bytes_per_word;
AnnaBridge 175:b96e65c34a4d 791 obj->tx_buff.pos ++;
AnnaBridge 175:b96e65c34a4d 792 }
AnnaBridge 175:b96e65c34a4d 793
AnnaBridge 175:b96e65c34a4d 794 if (n_words) {
AnnaBridge 175:b96e65c34a4d 795 // Simulate clear of the interrupt flag
AnnaBridge 175:b96e65c34a4d 796 if (obj->serial.ier_msk & UART_IER_THRE_IE_Msk) {
AnnaBridge 175:b96e65c34a4d 797 UART_ENABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), UART_IER_THRE_IE_Msk);
AnnaBridge 175:b96e65c34a4d 798 }
AnnaBridge 175:b96e65c34a4d 799 }
AnnaBridge 175:b96e65c34a4d 800
AnnaBridge 175:b96e65c34a4d 801 return n_words;
AnnaBridge 175:b96e65c34a4d 802 }
AnnaBridge 175:b96e65c34a4d 803
AnnaBridge 175:b96e65c34a4d 804 static int serial_read_async(serial_t *obj)
AnnaBridge 175:b96e65c34a4d 805 {
AnnaBridge 175:b96e65c34a4d 806 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 807 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 808 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 809
AnnaBridge 175:b96e65c34a4d 810 uint32_t rx_fifo_busy = (((UART_T *) NU_MODBASE(obj->serial.uart))->FSR & UART_FSR_RX_POINTER_F_Msk) >> UART_FSR_RX_POINTER_F_Pos;
AnnaBridge 175:b96e65c34a4d 811
AnnaBridge 175:b96e65c34a4d 812 uint32_t bytes_per_word = obj->rx_buff.width / 8;
AnnaBridge 175:b96e65c34a4d 813
AnnaBridge 175:b96e65c34a4d 814 uint8_t *rx = (uint8_t *)(obj->rx_buff.buffer) + bytes_per_word * obj->rx_buff.pos;
AnnaBridge 175:b96e65c34a4d 815 int n_words = 0;
AnnaBridge 175:b96e65c34a4d 816 while (obj->rx_buff.pos < obj->rx_buff.length && rx_fifo_busy >= bytes_per_word) {
AnnaBridge 175:b96e65c34a4d 817 switch (bytes_per_word) {
AnnaBridge 175:b96e65c34a4d 818 case 4:
AnnaBridge 175:b96e65c34a4d 819 *rx ++ = UART_READ(((UART_T *) NU_MODBASE(obj->serial.uart)));
AnnaBridge 175:b96e65c34a4d 820 *rx ++ = UART_READ(((UART_T *) NU_MODBASE(obj->serial.uart)));
AnnaBridge 175:b96e65c34a4d 821 case 2:
AnnaBridge 175:b96e65c34a4d 822 *rx ++ = UART_READ(((UART_T *) NU_MODBASE(obj->serial.uart)));
AnnaBridge 175:b96e65c34a4d 823 case 1:
AnnaBridge 175:b96e65c34a4d 824 *rx ++ = UART_READ(((UART_T *) NU_MODBASE(obj->serial.uart)));
AnnaBridge 175:b96e65c34a4d 825 }
AnnaBridge 175:b96e65c34a4d 826
AnnaBridge 175:b96e65c34a4d 827 n_words ++;
AnnaBridge 175:b96e65c34a4d 828 rx_fifo_busy -= bytes_per_word;
AnnaBridge 175:b96e65c34a4d 829 obj->rx_buff.pos ++;
AnnaBridge 175:b96e65c34a4d 830
AnnaBridge 175:b96e65c34a4d 831 if ((obj->serial.event & SERIAL_EVENT_RX_CHARACTER_MATCH) &&
AnnaBridge 175:b96e65c34a4d 832 obj->char_match != SERIAL_RESERVED_CHAR_MATCH) {
AnnaBridge 175:b96e65c34a4d 833 uint8_t *rx_cmp = rx;
AnnaBridge 175:b96e65c34a4d 834 switch (bytes_per_word) {
AnnaBridge 175:b96e65c34a4d 835 case 4:
AnnaBridge 175:b96e65c34a4d 836 rx_cmp -= 2;
AnnaBridge 175:b96e65c34a4d 837 case 2:
AnnaBridge 175:b96e65c34a4d 838 rx_cmp --;
AnnaBridge 175:b96e65c34a4d 839 case 1:
AnnaBridge 175:b96e65c34a4d 840 rx_cmp --;
AnnaBridge 175:b96e65c34a4d 841 }
AnnaBridge 175:b96e65c34a4d 842 if (*rx_cmp == obj->char_match) {
AnnaBridge 175:b96e65c34a4d 843 obj->char_found = 1;
AnnaBridge 175:b96e65c34a4d 844 break;
AnnaBridge 175:b96e65c34a4d 845 }
AnnaBridge 175:b96e65c34a4d 846 }
AnnaBridge 175:b96e65c34a4d 847 }
AnnaBridge 175:b96e65c34a4d 848
AnnaBridge 175:b96e65c34a4d 849 if (n_words) {
AnnaBridge 175:b96e65c34a4d 850 // Simulate clear of the interrupt flag
AnnaBridge 175:b96e65c34a4d 851 if (obj->serial.ier_msk & (UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk)) {
AnnaBridge 175:b96e65c34a4d 852 UART_ENABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), (UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk));
AnnaBridge 175:b96e65c34a4d 853 }
AnnaBridge 175:b96e65c34a4d 854 }
AnnaBridge 175:b96e65c34a4d 855
AnnaBridge 175:b96e65c34a4d 856 return n_words;
AnnaBridge 175:b96e65c34a4d 857 }
AnnaBridge 175:b96e65c34a4d 858
AnnaBridge 175:b96e65c34a4d 859 static void serial_tx_buffer_set(serial_t *obj, const void *tx, size_t length, uint8_t width)
AnnaBridge 175:b96e65c34a4d 860 {
AnnaBridge 175:b96e65c34a4d 861 obj->tx_buff.buffer = (void *) tx;
AnnaBridge 175:b96e65c34a4d 862 obj->tx_buff.length = length;
AnnaBridge 175:b96e65c34a4d 863 obj->tx_buff.pos = 0;
AnnaBridge 175:b96e65c34a4d 864 obj->tx_buff.width = width;
AnnaBridge 175:b96e65c34a4d 865 }
AnnaBridge 175:b96e65c34a4d 866
AnnaBridge 175:b96e65c34a4d 867 static void serial_rx_buffer_set(serial_t *obj, void *rx, size_t length, uint8_t width)
AnnaBridge 175:b96e65c34a4d 868 {
AnnaBridge 175:b96e65c34a4d 869 obj->rx_buff.buffer = rx;
AnnaBridge 175:b96e65c34a4d 870 obj->rx_buff.length = length;
AnnaBridge 175:b96e65c34a4d 871 obj->rx_buff.pos = 0;
AnnaBridge 175:b96e65c34a4d 872 obj->rx_buff.width = width;
AnnaBridge 175:b96e65c34a4d 873 }
AnnaBridge 175:b96e65c34a4d 874
AnnaBridge 175:b96e65c34a4d 875 static void serial_tx_enable_interrupt(serial_t *obj, uint32_t handler, uint8_t enable)
AnnaBridge 175:b96e65c34a4d 876 {
AnnaBridge 175:b96e65c34a4d 877 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 878 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 879 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 880
AnnaBridge 175:b96e65c34a4d 881 // Necessary for both interrupt way and DMA way
AnnaBridge 175:b96e65c34a4d 882 // A flag to indicate async mode, and tx/rx handlers can be different.
AnnaBridge 175:b96e65c34a4d 883 obj->serial.async_en = 1;
AnnaBridge 175:b96e65c34a4d 884 obj->serial.irq_handler_tx_async = (void (*)(void)) handler;
AnnaBridge 175:b96e65c34a4d 885 serial_enable_interrupt(obj, TxIrq, enable);
AnnaBridge 175:b96e65c34a4d 886 }
AnnaBridge 175:b96e65c34a4d 887
AnnaBridge 175:b96e65c34a4d 888 static void serial_rx_enable_interrupt(serial_t *obj, uint32_t handler, uint8_t enable)
AnnaBridge 175:b96e65c34a4d 889 {
AnnaBridge 175:b96e65c34a4d 890 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 891 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 892 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 893
AnnaBridge 175:b96e65c34a4d 894 // Necessary for both interrupt way and DMA way
AnnaBridge 175:b96e65c34a4d 895 // A flag to indicate async mode, and tx/rx handlers can be different.
AnnaBridge 175:b96e65c34a4d 896 obj->serial.async_en = 1;
AnnaBridge 175:b96e65c34a4d 897 obj->serial.irq_handler_rx_async = (void (*) (void)) handler;
AnnaBridge 175:b96e65c34a4d 898 serial_enable_interrupt(obj, RxIrq, enable);
AnnaBridge 175:b96e65c34a4d 899 }
AnnaBridge 175:b96e65c34a4d 900
AnnaBridge 175:b96e65c34a4d 901 static void serial_enable_interrupt(serial_t *obj, SerialIrq irq, uint32_t enable)
AnnaBridge 175:b96e65c34a4d 902 {
AnnaBridge 175:b96e65c34a4d 903 if (enable) {
AnnaBridge 175:b96e65c34a4d 904 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 905 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 906 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 907
AnnaBridge 175:b96e65c34a4d 908 NVIC_SetVector(modinit->irq_n, (uint32_t) obj->serial.vec);
AnnaBridge 175:b96e65c34a4d 909 NVIC_EnableIRQ(modinit->irq_n);
AnnaBridge 175:b96e65c34a4d 910
AnnaBridge 175:b96e65c34a4d 911 struct nu_uart_var *var = (struct nu_uart_var *) modinit->var;
AnnaBridge 175:b96e65c34a4d 912 // Multiple serial S/W objects for single UART H/W module possibly.
AnnaBridge 175:b96e65c34a4d 913 // Bind serial S/W object to UART H/W module as interrupt is enabled.
AnnaBridge 175:b96e65c34a4d 914 var->obj = obj;
AnnaBridge 175:b96e65c34a4d 915
AnnaBridge 175:b96e65c34a4d 916 switch (irq) {
AnnaBridge 175:b96e65c34a4d 917 // NOTE: Setting ier_msk first to avoid race condition
AnnaBridge 175:b96e65c34a4d 918 case RxIrq:
AnnaBridge 175:b96e65c34a4d 919 obj->serial.ier_msk = obj->serial.ier_msk | (UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk);
AnnaBridge 175:b96e65c34a4d 920 UART_ENABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), (UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk));
AnnaBridge 175:b96e65c34a4d 921 break;
AnnaBridge 175:b96e65c34a4d 922 case TxIrq:
AnnaBridge 175:b96e65c34a4d 923 obj->serial.ier_msk = obj->serial.ier_msk | UART_IER_THRE_IE_Msk;
AnnaBridge 175:b96e65c34a4d 924 UART_ENABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), UART_IER_THRE_IE_Msk);
AnnaBridge 175:b96e65c34a4d 925 break;
AnnaBridge 175:b96e65c34a4d 926 }
AnnaBridge 175:b96e65c34a4d 927 }
AnnaBridge 175:b96e65c34a4d 928 else { // disable
AnnaBridge 175:b96e65c34a4d 929 switch (irq) {
AnnaBridge 175:b96e65c34a4d 930 case RxIrq:
AnnaBridge 175:b96e65c34a4d 931 UART_DISABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), (UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk));
AnnaBridge 175:b96e65c34a4d 932 obj->serial.ier_msk = obj->serial.ier_msk & ~(UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk);
AnnaBridge 175:b96e65c34a4d 933 break;
AnnaBridge 175:b96e65c34a4d 934 case TxIrq:
AnnaBridge 175:b96e65c34a4d 935 UART_DISABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), UART_IER_THRE_IE_Msk);
AnnaBridge 175:b96e65c34a4d 936 obj->serial.ier_msk = obj->serial.ier_msk & ~UART_IER_THRE_IE_Msk;
AnnaBridge 175:b96e65c34a4d 937 break;
AnnaBridge 175:b96e65c34a4d 938 }
AnnaBridge 175:b96e65c34a4d 939 }
AnnaBridge 175:b96e65c34a4d 940 }
AnnaBridge 175:b96e65c34a4d 941
AnnaBridge 175:b96e65c34a4d 942 static void serial_rollback_interrupt(serial_t *obj, SerialIrq irq)
AnnaBridge 175:b96e65c34a4d 943 {
AnnaBridge 175:b96e65c34a4d 944 const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
AnnaBridge 175:b96e65c34a4d 945 MBED_ASSERT(modinit != NULL);
AnnaBridge 175:b96e65c34a4d 946 MBED_ASSERT(modinit->modname == (int) obj->serial.uart);
AnnaBridge 175:b96e65c34a4d 947
AnnaBridge 175:b96e65c34a4d 948 obj->serial.async_en = 0;
AnnaBridge 175:b96e65c34a4d 949 serial_enable_interrupt(obj, irq, obj->serial.irq_en);
AnnaBridge 175:b96e65c34a4d 950 }
AnnaBridge 175:b96e65c34a4d 951
AnnaBridge 175:b96e65c34a4d 952 static void serial_check_dma_usage(DMAUsage *dma_usage, int *dma_ch)
AnnaBridge 175:b96e65c34a4d 953 {
AnnaBridge 175:b96e65c34a4d 954 if (*dma_usage != DMA_USAGE_NEVER) {
AnnaBridge 175:b96e65c34a4d 955 if (*dma_ch == DMA_ERROR_OUT_OF_CHANNELS) {
AnnaBridge 175:b96e65c34a4d 956 *dma_ch = dma_channel_allocate(DMA_CAP_NONE);
AnnaBridge 175:b96e65c34a4d 957 }
AnnaBridge 175:b96e65c34a4d 958 if (*dma_ch == DMA_ERROR_OUT_OF_CHANNELS) {
AnnaBridge 175:b96e65c34a4d 959 *dma_usage = DMA_USAGE_NEVER;
AnnaBridge 175:b96e65c34a4d 960 }
AnnaBridge 175:b96e65c34a4d 961 }
AnnaBridge 175:b96e65c34a4d 962 else {
AnnaBridge 175:b96e65c34a4d 963 dma_channel_free(*dma_ch);
AnnaBridge 175:b96e65c34a4d 964 *dma_ch = DMA_ERROR_OUT_OF_CHANNELS;
AnnaBridge 175:b96e65c34a4d 965 }
AnnaBridge 175:b96e65c34a4d 966 }
AnnaBridge 175:b96e65c34a4d 967
AnnaBridge 175:b96e65c34a4d 968 static int serial_is_irq_en(serial_t *obj, SerialIrq irq)
AnnaBridge 175:b96e65c34a4d 969 {
AnnaBridge 175:b96e65c34a4d 970 int ier_msk = 0;
AnnaBridge 175:b96e65c34a4d 971
AnnaBridge 175:b96e65c34a4d 972 switch (irq) {
AnnaBridge 175:b96e65c34a4d 973 case RxIrq:
AnnaBridge 175:b96e65c34a4d 974 ier_msk = obj->serial.ier_msk & (UART_IER_RDA_IE_Msk | UART_IER_RTO_IE_Msk);
AnnaBridge 175:b96e65c34a4d 975 break;
AnnaBridge 175:b96e65c34a4d 976 case TxIrq:
AnnaBridge 175:b96e65c34a4d 977 ier_msk = obj->serial.ier_msk & UART_IER_THRE_IE_Msk;
AnnaBridge 175:b96e65c34a4d 978 break;
AnnaBridge 175:b96e65c34a4d 979 }
AnnaBridge 175:b96e65c34a4d 980
AnnaBridge 175:b96e65c34a4d 981 return !! ier_msk;
AnnaBridge 175:b96e65c34a4d 982 }
AnnaBridge 175:b96e65c34a4d 983
AnnaBridge 175:b96e65c34a4d 984 #endif // #if DEVICE_SERIAL_ASYNCH
AnnaBridge 175:b96e65c34a4d 985 #endif // #if DEVICE_SERIAL