Janek Mann
mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of
mbed-src
by 
mbed official
Diff: targets/hal/TARGET_NXP/TARGET_LPC43XX/serial_api.c
- Revision:
- 256:76fd9a263045
- Parent:
- 251:de9a1e4ffd79
- Child:
- 284:bf0f62a62bf4
--- a/targets/hal/TARGET_NXP/TARGET_LPC43XX/serial_api.c Fri Jul 11 10:00:08 2014 +0100
+++ b/targets/hal/TARGET_NXP/TARGET_LPC43XX/serial_api.c Tue Jul 15 07:45:08 2014 +0100
@@ -24,34 +24,87 @@
#include "cmsis.h"
#include "pinmap.h"
#include "error.h"
+#include "gpio_api.h"
/******************************************************************************
* INITIALIZATION
******************************************************************************/
+#define UART_NUM 4
+
static const PinMap PinMap_UART_TX[] = {
- {UART0_TX, UART_0, (SCU_PINIO_PULLDOWN | 2)},
- {UART1_TX, UART_1, (SCU_PINIO_PULLDOWN | 4)},
- {UART2_TX, UART_2, (SCU_PINIO_PULLDOWN | 2)},
- {UART3_TX, UART_3, (SCU_PINIO_PULLDOWN | 2)},
- {NC , NC , 0}
+ {P1_13, UART_1, (SCU_MODE_PULLDOWN | 1)},
+ {P1_15, UART_2, (SCU_MODE_PULLDOWN | 1)},
+ {P2_0, UART_0, (SCU_MODE_PULLDOWN | 1)},
+ {P2_3, UART_3, (SCU_MODE_PULLDOWN | 2)},
+ {P2_10, UART_2, (SCU_MODE_PULLDOWN | 2)},
+ {P3_4, UART_1, (SCU_MODE_PULLDOWN | 4)},
+ {P4_1, UART_3, (SCU_MODE_PULLDOWN | 6)},
+ {P5_6, UART_1, (SCU_MODE_PULLDOWN | 4)},
+ {P6_4, UART_0, (SCU_MODE_PULLDOWN | 2)},
+ {P7_1, UART_2, (SCU_MODE_PULLDOWN | 6)},
+ {P9_3, UART_3, (SCU_MODE_PULLDOWN | 7)},
+ {P9_5, UART_0, (SCU_MODE_PULLDOWN | 7)},
+ {PA_1, UART_2, (SCU_MODE_PULLDOWN | 3)},
+ {PC_13, UART_1, (SCU_MODE_PULLDOWN | 2)},
+ {PE_11, UART_1, (SCU_MODE_PULLDOWN | 2)},
+ {PF_2, UART_3, (SCU_MODE_PULLDOWN | 1)},
+ {PF_10, UART_0, (SCU_MODE_PULLDOWN | 1)},
+ {NC, NC, 0}
};
static const PinMap PinMap_UART_RX[] = {
- {UART0_RX, UART_0, (SCU_PINIO_PULLDOWN | 2)},
- {UART1_RX, UART_1, (SCU_PINIO_PULLDOWN | 1)},
- {UART2_RX, UART_2, (SCU_PINIO_PULLDOWN | 2)},
- {UART3_RX, UART_3, (SCU_PINIO_PULLDOWN | 2)},
- {NC , NC , 0}
+ {P1_14, UART_1, (SCU_PINIO_PULLNONE | 1)},
+ {P1_16, UART_2, (SCU_PINIO_PULLNONE | 1)},
+ {P2_1, UART_0, (SCU_PINIO_PULLNONE | 1)},
+ {P2_4, UART_3, (SCU_PINIO_PULLNONE | 2)},
+ {P2_11, UART_2, (SCU_PINIO_PULLNONE | 2)},
+ {P3_5, UART_1, (SCU_PINIO_PULLNONE | 4)},
+ {P4_2, UART_3, (SCU_PINIO_PULLNONE | 6)},
+ {P5_7, UART_1, (SCU_PINIO_PULLNONE | 4)},
+ {P6_5, UART_0, (SCU_PINIO_PULLNONE | 2)},
+ {P7_2, UART_2, (SCU_PINIO_PULLNONE | 6)},
+ {P9_4, UART_3, (SCU_PINIO_PULLNONE | 7)},
+ {P9_6, UART_0, (SCU_PINIO_PULLNONE | 7)},
+ {PA_2, UART_2, (SCU_PINIO_PULLNONE | 3)},
+ {PC_14, UART_1, (SCU_PINIO_PULLNONE | 2)},
+ {PE_12, UART_1, (SCU_PINIO_PULLNONE | 2)},
+ {PF_3, UART_3, (SCU_PINIO_PULLNONE | 1)},
+ {PF_11, UART_0, (SCU_PINIO_PULLNONE | 1)},
+ {NC, NC, 0}
};
-#define UART_NUM 4
+#if (DEVICE_SERIAL_FC)
+// RTS/CTS PinMap for flow control
+static const PinMap PinMap_UART_RTS[] = {
+ {P1_9, UART_1, (SCU_PINIO_FAST | 1)},
+ {P5_2, UART_1, (SCU_PINIO_FAST | 4)},
+ {PC_3, UART_1, (SCU_PINIO_FAST | 2)},
+ {PE_5, UART_1, (SCU_PINIO_FAST | 2)},
+ {NC, NC, 0}
+};
-static uint32_t serial_irq_ids[UART_NUM] = {0};
+static const PinMap PinMap_UART_CTS[] = {
+ {P1_11, UART_1, (SCU_PINIO_FAST | 1)},
+ {P5_4, UART_1, (SCU_PINIO_FAST | 4),
+ {PC_2, UART_1, (SCU_PINIO_FAST | 2)},
+ {PE_7, UART_1, (SCU_PINIO_FAST | 2)},
+ {NC, NC, 0}
+};
+#endif
+
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];
+
void serial_init(serial_t *obj, PinName tx, PinName rx) {
int is_stdio_uart = 0;
@@ -77,7 +130,8 @@
| 0 << 2; // Rx Line Status irq enable
// set default baud rate and format
- serial_baud (obj, 9600);
+ is_stdio_uart = (uart == STDIO_UART) ? (1) : (0);
+ serial_baud (obj, is_stdio_uart ? 115200 : 9600);
serial_format(obj, 8, ParityNone, 1);
// pinout the chosen uart
@@ -92,15 +146,11 @@
case UART_0: obj->index = 0; break;
case UART_1: obj->index = 1; break;
case UART_2: obj->index = 2; break;
-#if (UART_NUM > 3)
case UART_3: obj->index = 3; break;
-#endif
-#if (UART_NUM > 4)
- case UART_4: obj->index = 4; break;
-#endif
}
-
- is_stdio_uart = (uart == STDIO_UART) ? (1) : (0);
+ uart_data[obj->index].sw_rts.pin = NC;
+ uart_data[obj->index].sw_cts.pin = NC;
+ serial_set_flow_control(obj, FlowControlNone, NC, NC);
if (is_stdio_uart) {
stdio_uart_inited = 1;
@@ -109,14 +159,14 @@
}
void serial_free(serial_t *obj) {
- serial_irq_ids[obj->index] = 0;
+ 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) {
uint32_t PCLK = SystemCoreClock;
-
+
// First we check to see if the basic divide with no DivAddVal/MulVal
// ratio gives us an integer result. If it does, we set DivAddVal = 0,
// MulVal = 1. Otherwise, we search the valid ratio value range to find
@@ -192,12 +242,16 @@
}
void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
- MBED_ASSERT((stop_bits == 1) || (stop_bits == 2)); // 0: 1 stop bits, 1: 2 stop bits
- MBED_ASSERT((data_bits > 4) && (data_bits < 9)); // 0: 5 data bits ... 3: 8 data bits
- MBED_ASSERT((parity == ParityNone) || (parity == ParityOdd) || (parity == ParityEven) ||
- (parity == ParityForced1) || (parity == ParityForced0));
-
+ // 0: 1 stop bits, 1: 2 stop bits
+ if (stop_bits != 1 && stop_bits != 2) {
+ error("Invalid stop bits specified");
+ }
stop_bits -= 1;
+
+ // 0: 5 data bits ... 3: 8 data bits
+ if (data_bits < 5 || data_bits > 8) {
+ error("Invalid number of bits (%d) in serial format, should be 5..8", data_bits);
+ }
data_bits -= 5;
int parity_enable, parity_select;
@@ -208,7 +262,8 @@
case ParityForced1: parity_enable = 1; parity_select = 2; break;
case ParityForced0: parity_enable = 1; parity_select = 3; break;
default:
- break;
+ error("Invalid serial parity setting");
+ return;
}
obj->uart->LCR = data_bits << 0
@@ -220,7 +275,7 @@
/******************************************************************************
* INTERRUPTS HANDLING
******************************************************************************/
-static inline void uart_irq(uint32_t iir, uint32_t index) {
+static inline void uart_irq(uint32_t iir, uint32_t index, LPC_USART_T *puart) {
// [Chapter 14] LPC17xx UART0/2/3: UARTn Interrupt Handling
SerialIrq irq_type;
switch (iir) {
@@ -228,27 +283,33 @@
case 2: irq_type = RxIrq; break;
default: return;
}
-
- if (serial_irq_ids[index] != 0)
- irq_handler(serial_irq_ids[index], irq_type);
+ if ((RxIrq == irq_type) && (NC != uart_data[index].sw_rts.pin)) {
+ gpio_write(&uart_data[index].sw_rts, 1);
+ // Disable interrupt if it wasn't enabled by other part of the application
+ if (!uart_data[index].rx_irq_set_api)
+ puart->IER &= ~(1 << RxIrq);
+ }
+ if (uart_data[index].serial_irq_id != 0)
+ if ((irq_type != RxIrq) || (uart_data[index].rx_irq_set_api))
+ irq_handler(uart_data[index].serial_irq_id, irq_type);
}
-void uart0_irq() {uart_irq((LPC_USART0->IIR >> 1) & 0x7, 0);}
-void uart1_irq() {uart_irq((LPC_UART1->IIR >> 1) & 0x7, 1);}
-void uart2_irq() {uart_irq((LPC_USART2->IIR >> 1) & 0x7, 2);}
-void uart3_irq() {uart_irq((LPC_USART3->IIR >> 1) & 0x7, 3);}
+void uart0_irq() {uart_irq((LPC_USART0->IIR >> 1) & 0x7, 0, (LPC_USART_T*)LPC_USART0);}
+void uart1_irq() {uart_irq((LPC_UART1->IIR >> 1) & 0x7, 1, (LPC_USART_T*)LPC_UART1);}
+void uart2_irq() {uart_irq((LPC_USART2->IIR >> 1) & 0x7, 2, (LPC_USART_T*)LPC_USART2);}
+void uart3_irq() {uart_irq((LPC_USART3->IIR >> 1) & 0x7, 3, (LPC_USART_T*)LPC_USART3);}
void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
irq_handler = handler;
- serial_irq_ids[obj->index] = id;
+ uart_data[obj->index].serial_irq_id = id;
}
-void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
+static void serial_irq_set_internal(serial_t *obj, SerialIrq irq, uint32_t enable) {
IRQn_Type irq_n = (IRQn_Type)0;
uint32_t vector = 0;
switch ((int)obj->uart) {
case UART_0: irq_n=USART0_IRQn; vector = (uint32_t)&uart0_irq; break;
- case UART_1: irq_n=UART1_IRQn; vector = (uint32_t)&uart1_irq; break;
+ case UART_1: irq_n=UART1_IRQn; vector = (uint32_t)&uart1_irq; break;
case UART_2: irq_n=USART2_IRQn; vector = (uint32_t)&uart2_irq; break;
case UART_3: irq_n=USART3_IRQn; vector = (uint32_t)&uart3_irq; break;
}
@@ -257,7 +318,7 @@
obj->uart->IER |= 1 << irq;
NVIC_SetVector(irq_n, vector);
NVIC_EnableIRQ(irq_n);
- } else { // disable
+ } else if ((TxIrq == irq) || (uart_data[obj->index].rx_irq_set_api + uart_data[obj->index].rx_irq_set_flow == 0)) { // disable
int all_disabled = 0;
SerialIrq other_irq = (irq == RxIrq) ? (TxIrq) : (RxIrq);
obj->uart->IER &= ~(1 << irq);
@@ -267,17 +328,36 @@
}
}
+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);
+}
+
+#if (DEVICE_SERIAL_FC)
+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);
+}
+#endif
+
/******************************************************************************
* READ/WRITE
******************************************************************************/
int serial_getc(serial_t *obj) {
while (!serial_readable(obj));
- return obj->uart->RBR;
+ int data = obj->uart->RBR;
+ if (NC != uart_data[obj->index].sw_rts.pin) {
+ gpio_write(&uart_data[obj->index].sw_rts, 0);
+ obj->uart->IER |= 1 << RxIrq;
+ }
+ return data;
}
void serial_putc(serial_t *obj, int c) {
while (!serial_writable(obj));
obj->uart->THR = c;
+ uart_data[obj->index].count++;
}
int serial_readable(serial_t *obj) {
@@ -285,11 +365,21 @@
}
int serial_writable(serial_t *obj) {
- return obj->uart->LSR & 0x20;
+ int isWritable = 1;
+ if (NC != uart_data[obj->index].sw_cts.pin)
+ isWritable = (gpio_read(&uart_data[obj->index].sw_cts) == 0) && (obj->uart->LSR & 0x40); //If flow control: writable if CTS low + UART done
+ else {
+ if (obj->uart->LSR & 0x20)
+ uart_data[obj->index].count = 0;
+ else if (uart_data[obj->index].count >= 16)
+ isWritable = 0;
+ }
+ return isWritable;
}
void serial_clear(serial_t *obj) {
- obj->uart->FCR = 1 << 1 // rx FIFO reset
+ obj->uart->FCR = 1 << 0 // FIFO Enable - 0 = Disables, 1 = Enabled
+ | 1 << 1 // rx FIFO reset
| 1 << 2 // tx FIFO reset
| 0 << 6; // interrupt depth
}
@@ -306,3 +396,7 @@
obj->uart->LCR &= ~(1 << 6);
}
+void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow) {
+#if (DEVICE_SERIAL_FC)
+#endif
+}