added prescaler for 16 bit pwm in LPC1347 target
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Diff: targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/serial_api.c
- Revision:
- 0:9b334a45a8ff
- Child:
- 66:fdb3f9f9a72f
diff -r 000000000000 -r 9b334a45a8ff targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/serial_api.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/serial_api.c Thu Oct 01 15:25:22 2015 +0300 @@ -0,0 +1,636 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2015 ARM Limited + * + * 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. + */ +// math.h required for floating point operations for baud rate calculation +#include "mbed_assert.h" +#include <math.h> +#include <string.h> +#include <stdlib.h> + +#include "serial_api.h" +#include "cmsis.h" +#include "pinmap.h" +#include "gpio_api.h" + +#include "scif_iodefine.h" +#include "cpg_iodefine.h" + +/****************************************************************************** + * INITIALIZATION + ******************************************************************************/ +#define PCLK (66666666) // Define the peripheral clock P1 frequency. + +#define UART_NUM 8 +#define IRQ_NUM 2 + +static void uart0_tx_irq(void); +static void uart1_tx_irq(void); +static void uart2_tx_irq(void); +static void uart3_tx_irq(void); +static void uart4_tx_irq(void); +static void uart5_tx_irq(void); +static void uart6_tx_irq(void); +static void uart7_tx_irq(void); +static void uart0_rx_irq(void); +static void uart1_rx_irq(void); +static void uart2_rx_irq(void); +static void uart3_rx_irq(void); +static void uart4_rx_irq(void); +static void uart5_rx_irq(void); +static void uart6_rx_irq(void); +static void uart7_rx_irq(void); + + +static const PinMap PinMap_UART_TX[] = { + {P2_14 , UART0, 6}, + {P2_5 , UART1, 6}, + {P4_12 , UART1, 7}, + {P6_3 , UART2, 7}, + {P4_14 , UART2, 7}, + {P5_3 , UART3, 5}, + {P8_8 , UART3, 7}, + {P5_0 , UART4, 5}, + {P8_14 , UART4, 7}, + {P8_13 , UART5, 5}, + {P11_10, UART5, 3}, + {P6_6 , UART5, 5}, + {P5_6 , UART6, 5}, + {P11_1 , UART6, 4}, + {P7_4 , UART7, 4}, + {NC , NC , 0} +}; + +static const PinMap PinMap_UART_RX[] = { + {P2_15 , UART0, 6}, + {P2_6 , UART1, 6}, + {P4_13 , UART1, 7}, + {P6_2 , UART2, 7}, + {P4_15 , UART2, 7}, + {P5_4 , UART3, 5}, + {P8_9 , UART3, 7}, + {P5_1 , UART4, 5}, + {P8_15 , UART4, 7}, + {P8_11 , UART5, 5}, + {P11_11, UART5, 3}, + {P6_7 , UART5, 5}, + {P5_7 , UART6, 5}, + {P11_2 , UART6, 4}, + {P7_5 , UART7, 4}, + {NC , NC , 0} +}; + +static const PinMap PinMap_UART_CTS[] = { + {P2_3 , UART1, 6}, + {P11_7 , UART5, 3}, + {P7_6 , UART7, 4}, + {NC , NC , 0} +}; +static const PinMap PinMap_UART_RTS[] = { + {P2_7 , UART1, 6}, + {P11_8 , UART5, 3}, + {P7_7 , UART7, 4}, + {NC , NC , 0} +}; + + + +static const struct st_scif *SCIF[] = SCIF_ADDRESS_LIST; +static uart_irq_handler irq_handler; + +int stdio_uart_inited = 0; +serial_t stdio_uart; + +struct serial_global_data_s { + uint32_t serial_irq_id; + gpio_t sw_rts, sw_cts; + uint8_t count, rx_irq_set_flow, rx_irq_set_api; +}; + +static struct serial_global_data_s uart_data[UART_NUM]; + +static const IRQn_Type irq_set_tbl[UART_NUM][IRQ_NUM] = { + {SCIFRXI0_IRQn, SCIFTXI0_IRQn}, + {SCIFRXI1_IRQn, SCIFTXI1_IRQn}, + {SCIFRXI2_IRQn, SCIFTXI2_IRQn}, + {SCIFRXI3_IRQn, SCIFTXI3_IRQn}, + {SCIFRXI4_IRQn, SCIFTXI4_IRQn}, + {SCIFRXI5_IRQn, SCIFTXI5_IRQn}, + {SCIFRXI6_IRQn, SCIFTXI6_IRQn}, + {SCIFRXI7_IRQn, SCIFTXI7_IRQn} +}; + +static const IRQHandler hander_set_tbl[UART_NUM][IRQ_NUM] = { + {uart0_rx_irq, uart0_tx_irq}, + {uart1_rx_irq, uart1_tx_irq}, + {uart2_rx_irq, uart2_tx_irq}, + {uart3_rx_irq, uart3_tx_irq}, + {uart4_rx_irq, uart4_tx_irq}, + {uart5_rx_irq, uart5_tx_irq}, + {uart6_rx_irq, uart6_tx_irq}, + {uart7_rx_irq, uart7_tx_irq} +}; + +static __IO uint16_t *SCSCR_MATCH[] = { + &SCSCR_0, + &SCSCR_1, + &SCSCR_2, + &SCSCR_3, + &SCSCR_4, + &SCSCR_5, + &SCSCR_6, + &SCSCR_7, +}; + +static __IO uint16_t *SCFSR_MATCH[] = { + &SCFSR_0, + &SCFSR_1, + &SCFSR_2, + &SCFSR_3, + &SCFSR_4, + &SCFSR_5, + &SCFSR_6, + &SCFSR_7, +}; + + +void serial_init(serial_t *obj, PinName tx, PinName rx) { + volatile uint8_t dummy ; + int is_stdio_uart = 0; + // determine the UART to use + uint32_t uart_tx = pinmap_peripheral(tx, PinMap_UART_TX); + uint32_t uart_rx = pinmap_peripheral(rx, PinMap_UART_RX); + uint32_t uart = pinmap_merge(uart_tx, uart_rx); + + MBED_ASSERT((int)uart != NC); + + obj->uart = (struct st_scif *)SCIF[uart]; + // enable power + switch (uart) { + case UART0: + CPG.STBCR4 &= ~(1 << 7); + break; + case UART1: + CPG.STBCR4 &= ~(1 << 6); + break; + case UART2: + CPG.STBCR4 &= ~(1 << 5); + break; + case UART3: + CPG.STBCR4 &= ~(1 << 4); + break; + case UART4: + CPG.STBCR4 &= ~(1 << 3); + break; + case UART5: + CPG.STBCR4 &= ~(1 << 2); + break; + case UART6: + CPG.STBCR4 &= ~(1 << 1); + break; + case UART7: + CPG.STBCR4 &= ~(1 << 0); + break; + } + dummy = CPG.STBCR4; + + /* ==== SCIF initial setting ==== */ + /* ---- Serial control register (SCSCR) setting ---- */ + /* B'00 : Internal CLK */ + obj->uart->SCSCR = 0x0000u; /* SCIF transmitting and receiving operations stop */ + + /* ---- FIFO control register (SCFCR) setting ---- */ + /* Transmit FIFO reset & Receive FIFO data register reset */ + obj->uart->SCFCR = 0x0006; + + /* ---- Serial status register (SCFSR) setting ---- */ + dummy = obj->uart->SCFSR; + obj->uart->SCFSR = (dummy & 0xFF6Cu); /* ER,BRK,DR bit clear */ + + /* ---- Line status register (SCLSR) setting ---- */ + /* ORER bit clear */ + obj->uart->SCLSR = 0; + + /* ---- Serial extension mode register (SCEMR) setting ---- + b7 BGDM - Baud rate generator double-speed mode : Normal mode + b0 ABCS - Base clock select in asynchronous mode : Base clock is 16 times the bit rate */ + obj->uart->SCEMR = 0x0000u; + + /* ---- Bit rate register (SCBRR) setting ---- */ + serial_baud (obj, 9600); + serial_format(obj, 8, ParityNone, 1); + + /* ---- FIFO control register (SCFCR) setting ---- */ + obj->uart->SCFCR = 0x0030u; + + /* ---- Serial port register (SCSPTR) setting ---- + b1 SPB2IO - Serial port break output : disabled + b0 SPB2DT - Serial port break data : High-level */ + obj->uart->SCSPTR = 0x0003u; // SPB2IO = 1, SPB2DT = 1 + + /* ---- Line status register (SCLSR) setting ---- + b0 ORER - Overrun error detect : clear */ + + if (obj->uart->SCLSR & 0x0001) { + obj->uart->SCLSR = 0u; // ORER clear + } + + // pinout the chosen uart + pinmap_pinout(tx, PinMap_UART_TX); + pinmap_pinout(rx, PinMap_UART_RX); + + switch (uart) { + case UART0: + obj->index = 0; + break; + case UART1: + obj->index = 1; + break; + case UART2: + obj->index = 2; + break; + case UART3: + obj->index = 3; + break; + case UART4: + obj->index = 4; + break; + case UART5: + obj->index = 5; + break; + case UART6: + obj->index = 6; + break; + case UART7: + obj->index = 7; + break; + } + uart_data[obj->index].sw_rts.pin = NC; + uart_data[obj->index].sw_cts.pin = NC; + + /* ---- Serial control register (SCSCR) setting ---- */ + /* Setting the TE and RE bits enables the TxD and RxD pins to be used. */ + obj->uart->SCSCR = 0x00F0; + + is_stdio_uart = (uart == STDIO_UART) ? (1) : (0); + + if (is_stdio_uart) { + stdio_uart_inited = 1; + memcpy(&stdio_uart, obj, sizeof(serial_t)); + } +} + +void serial_free(serial_t *obj) { + uart_data[obj->index].serial_irq_id = 0; +} + +// serial_baud +// set the baud rate, taking in to account the current SystemFrequency +void serial_baud(serial_t *obj, int baudrate) { + uint16_t DL; + + obj->uart->SCSMR &= ~0x0003; + + if (baudrate > 32552) { + obj->uart->SCEMR = 0x0081; // BGDM = 1, ABCS = 1 + DL = PCLK / (8 * baudrate); + if (DL > 0) { + DL--; + } + obj->uart->SCBRR = (uint8_t)DL; + } else if (baudrate > 16276) { + obj->uart->SCEMR = 0x0080; // BGDM = 1 + obj->uart->SCBRR = PCLK / (16 * baudrate) - 1; + } else if (baudrate > 8138) { + obj->uart->SCEMR = 0x0000; + obj->uart->SCBRR = PCLK / (32 * baudrate) - 1; + } else if (baudrate > 4169) { + obj->uart->SCSMR |= 0x0001; + obj->uart->SCEMR = 0x0080; // BGDM = 1 + obj->uart->SCBRR = PCLK / (64 * baudrate) - 1; + } else if (baudrate > 2034) { + obj->uart->SCSMR |= 0x0001; + obj->uart->SCEMR = 0x0000; + obj->uart->SCBRR = PCLK / (128 * baudrate) - 1; + } else if (baudrate > 1017) { + obj->uart->SCSMR |= 0x0002; + obj->uart->SCEMR = 0x0080; // BGDM = 1 + obj->uart->SCBRR = PCLK / (256 * baudrate) - 1; + } else if (baudrate > 508) { + obj->uart->SCSMR |= 0x0002; + obj->uart->SCEMR = 0x0000; + obj->uart->SCBRR = PCLK / (512 * baudrate) - 1; + } else if (baudrate > 254) { + obj->uart->SCSMR |= 0x0003; + obj->uart->SCEMR = 0x0080; // BGDM = 1 + obj->uart->SCBRR = PCLK / (1024 * baudrate) - 1; + } else if (baudrate > 127) { + obj->uart->SCSMR |= 0x0003; + obj->uart->SCEMR = 0x0000; + obj->uart->SCBRR = PCLK / (2048 * baudrate) - 1; + } else { + obj->uart->SCSMR |= 0x0003; + obj->uart->SCEMR = 0x0000; + obj->uart->SCBRR = 0xFFu; + } +} + +void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) { + int parity_enable; + int parity_select; + + MBED_ASSERT((stop_bits == 1) || (stop_bits == 2)); // 0: 1 stop bits, 1: 2 stop bits + MBED_ASSERT((data_bits > 4) && (data_bits < 9)); // 5: 5 data bits ... 3: 8 data bits + MBED_ASSERT((parity == ParityNone) || (parity == ParityOdd) || (parity == ParityEven) || + (parity == ParityForced1) || (parity == ParityForced0)); + + stop_bits = (stop_bits == 1)? 0: + (stop_bits == 2)? 1: + 0; // must not to be + + data_bits = (data_bits == 8)? 0: + (data_bits == 7)? 1: + 0; // must not to be + + switch (parity) { + case ParityNone: + parity_enable = 0; + parity_select = 0; + break; + case ParityOdd: + parity_enable = 1; + parity_select = 1; + break; + case ParityEven: + parity_enable = 1; + parity_select = 0; + break; + case ParityForced1: + case ParityForced0: + default: + parity_enable = 0; + parity_select = 0; + break; + } + + obj->uart->SCSMR = data_bits << 6 + | parity_enable << 5 + | parity_select << 4 + | stop_bits << 3; +} + +/****************************************************************************** + * INTERRUPTS HANDLING + ******************************************************************************/ + +static void uart_tx_irq(IRQn_Type irq_num, uint32_t index) { + __IO uint16_t *dmy_rd_scscr; + __IO uint16_t *dmy_rd_scfsr; + + dmy_rd_scscr = SCSCR_MATCH[index]; + *dmy_rd_scscr &= 0x007B; // Clear TIE and Write to bit15~8,2 is always 0 + dmy_rd_scfsr = SCFSR_MATCH[index]; + *dmy_rd_scfsr = (*dmy_rd_scfsr & ~0x0020); // Clear TDFE + + irq_handler(uart_data[index].serial_irq_id, TxIrq); +} + +static void uart_rx_irq(IRQn_Type irq_num, uint32_t index) { + __IO uint16_t *dmy_rd_scscr; + __IO uint16_t *dmy_rd_scfsr; + + dmy_rd_scscr = SCSCR_MATCH[index]; + *dmy_rd_scscr &= 0x00B3; // Clear RIE,REIE and Write to bit15~8,2 is always 0 + dmy_rd_scfsr = SCFSR_MATCH[index]; + *dmy_rd_scfsr = (*dmy_rd_scfsr & ~0x0003); // Clear RDF,DR + + irq_handler(uart_data[index].serial_irq_id, RxIrq); +} + +/* TX handler */ +static void uart0_tx_irq(void) { + uart_tx_irq(SCIFTXI0_IRQn, 0); +} +static void uart1_tx_irq(void) { + uart_tx_irq(SCIFTXI1_IRQn, 1); +} +static void uart2_tx_irq(void) { + uart_tx_irq(SCIFTXI2_IRQn, 2); +} +static void uart3_tx_irq(void) { + uart_tx_irq(SCIFTXI3_IRQn, 3); +} +static void uart4_tx_irq(void) { + uart_tx_irq(SCIFTXI4_IRQn, 4); +} +static void uart5_tx_irq(void) { + uart_tx_irq(SCIFTXI5_IRQn, 5); +} +static void uart6_tx_irq(void) { + uart_tx_irq(SCIFTXI6_IRQn, 6); +} +static void uart7_tx_irq(void) { + uart_tx_irq(SCIFTXI7_IRQn, 7); +} +/* RX handler */ +static void uart0_rx_irq(void) { + uart_rx_irq(SCIFRXI0_IRQn, 0); +} +static void uart1_rx_irq(void) { + uart_rx_irq(SCIFRXI1_IRQn, 1); +} +static void uart2_rx_irq(void) { + uart_rx_irq(SCIFRXI2_IRQn, 2); +} +static void uart3_rx_irq(void) { + uart_rx_irq(SCIFRXI3_IRQn, 3); +} +static void uart4_rx_irq(void) { + uart_rx_irq(SCIFRXI4_IRQn, 4); +} +static void uart5_rx_irq(void) { + uart_rx_irq(SCIFRXI5_IRQn, 5); +} +static void uart6_rx_irq(void) { + uart_rx_irq(SCIFRXI6_IRQn, 6); +} +static void uart7_rx_irq(void) { + uart_rx_irq(SCIFRXI7_IRQn, 7); +} + +void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) { + irq_handler = handler; + uart_data[obj->index].serial_irq_id = id; +} + +static void serial_irq_set_internal(serial_t *obj, SerialIrq irq, uint32_t enable) { + IRQn_Type IRQn; + IRQHandler handler; + + IRQn = irq_set_tbl[obj->index][irq]; + handler = hander_set_tbl[obj->index][irq]; + + if ((obj->index >= 0) && (obj->index <= 7)) { + if (enable) { + InterruptHandlerRegister(IRQn, (void (*)(uint32_t))handler); + GIC_SetPriority(IRQn, 5); + GIC_EnableIRQ(IRQn); + } else { + GIC_DisableIRQ(IRQn); + } + } +} + +void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) { + if (RxIrq == irq) { + uart_data[obj->index].rx_irq_set_api = enable; + } + serial_irq_set_internal(obj, irq, enable); +} + +static void serial_flow_irq_set(serial_t *obj, uint32_t enable) { + uart_data[obj->index].rx_irq_set_flow = enable; + serial_irq_set_internal(obj, RxIrq, enable); +} + +/****************************************************************************** + * READ/WRITE + ******************************************************************************/ +int serial_getc(serial_t *obj) { + uint16_t err_read; + int data; + int was_masked; + + was_masked = __disable_irq(); + if (obj->uart->SCFSR & 0x93) { + err_read = obj->uart->SCFSR; + obj->uart->SCFSR = (err_read & ~0x93); + } + obj->uart->SCSCR |= 0x0040; // Set RIE + if (!was_masked) { + __enable_irq(); + } + + if (obj->uart->SCLSR & 0x0001) { + obj->uart->SCLSR = 0u; // ORER clear + } + + while (!serial_readable(obj)); + data = obj->uart->SCFRDR & 0xff; + + was_masked = __disable_irq(); + err_read = obj->uart->SCFSR; + obj->uart->SCFSR = (err_read & 0xfffD); // Clear RDF + if (!was_masked) { + __enable_irq(); + } + + if (err_read & 0x80) { + data = -1; //err + } + return data; +} + +void serial_putc(serial_t *obj, int c) { + uint16_t dummy_read; + int was_masked; + + was_masked = __disable_irq(); + obj->uart->SCSCR |= 0x0080; // Set TIE + if (!was_masked) { + __enable_irq(); + } + while (!serial_writable(obj)); + obj->uart->SCFTDR = c; + was_masked = __disable_irq(); + dummy_read = obj->uart->SCFSR; + obj->uart->SCFSR = (dummy_read & 0xff9f); // Clear TEND/TDFE + if (!was_masked) { + __enable_irq(); + } + uart_data[obj->index].count++; +} + +int serial_readable(serial_t *obj) { + return ((obj->uart->SCFSR & 0x02) != 0); // RDF +} + +int serial_writable(serial_t *obj) { + return ((obj->uart->SCFSR & 0x20) != 0); // TDFE +} + +void serial_clear(serial_t *obj) { + int was_masked; + was_masked = __disable_irq(); + + obj->uart->SCFCR |= 0x06; // TFRST = 1, RFRST = 1 + obj->uart->SCFCR &= ~0x06; // TFRST = 0, RFRST = 0 + obj->uart->SCFSR &= ~0x0093u; // ER, BRK, RDF, DR = 0 + + if (!was_masked) { + __enable_irq(); + } +} + +void serial_pinout_tx(PinName tx) { + pinmap_pinout(tx, PinMap_UART_TX); +} + +void serial_break_set(serial_t *obj) { + int was_masked; + was_masked = __disable_irq(); + // TxD Output(L) + obj->uart->SCSPTR &= ~0x0001u; // SPB2DT = 0 + obj->uart->SCSCR &= ~0x0020u; // TE = 0 (Output disable) + if (!was_masked) { + __enable_irq(); + } +} + +void serial_break_clear(serial_t *obj) { + int was_masked; + was_masked = __disable_irq(); + obj->uart->SCSCR |= 0x0020u; // TE = 1 (Output enable) + obj->uart->SCSPTR |= 0x0001u; // SPB2DT = 1 + if (!was_masked) { + __enable_irq(); + } +} + +void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow) { + // determine the UART to use + int was_masked; + + serial_flow_irq_set(obj, 0); + + if (type == FlowControlRTSCTS) { + was_masked = __disable_irq(); + obj->uart->SCFCR = 0x0008u; // CTS/RTS enable + if (!was_masked) { + __enable_irq(); + } + pinmap_pinout(rxflow, PinMap_UART_RTS); + pinmap_pinout(txflow, PinMap_UART_CTS); + } else { + was_masked = __disable_irq(); + obj->uart->SCFCR = 0x0000u; // CTS/RTS diable + if (!was_masked) { + __enable_irq(); + } + } +} + + + +