lm3s1968: add keypad driver implementation to the example.

[bertos.git] / bertos / cpu / cortex-m3 / drv / ser_lm3s.c

diff --git a/bertos/cpu/cortex-m3/drv/ser_lm3s.c b/bertos/cpu/cortex-m3/drv/ser_lm3s.c
index d24094dd0f0af0af3f9cb118566008a04ed72b98..89ce1322413e682a0c245660bf05299ae4126ba2 100644 (file)
--- a/bertos/cpu/cortex-m3/drv/ser_lm3s.c
+++ b/bertos/cpu/cortex-m3/drv/ser_lm3s.c
@@ -58,6 +58,35 @@ struct CM3Serial
 /* Forward declaration */
 static struct CM3Serial UARTDesc[SER_CNT];
 
+/* GPIO descriptor for UART pins */
+struct gpio_uart_info
+{
+       /* GPIO base address register */
+       uint32_t base;
+       /* Pin(s) bitmask */
+       uint8_t pins;
+};
+
+/* Table to retrieve GPIO pins configuration to work as UART pins */
+static const struct gpio_uart_info gpio_uart[SER_CNT] =
+{
+       /* UART0 */
+       {
+               .base = GPIO_PORTA_BASE,
+               .pins = BV(1) | BV(0),
+       },
+       /* UART1 */
+       {
+               .base = GPIO_PORTD_BASE,
+               .pins = BV(3) | BV(2),
+       },
+       /* UART2 */
+       {
+               .base = GPIO_PORTG_BASE,
+               .pins = BV(1) | BV(0),
+       },
+};
+
 /* Clear the flags register */
 INLINE void lm3s_uartClear(uint32_t base)
 {
@@ -127,8 +156,8 @@ void lm3s_uartInit(int port)
        SYSCTL_RCGC2_R |= SYSCTL_RCGC2_GPIOA;
        lm3s_busyWait(512);
 
-       /* Set GPIO A0 and A1 as UART pins */
-       lm3s_gpioPinConfig(GPIO_PORTA_BASE, BV(0) | BV(1),
+       /* Configure GPIO pins to work as UART pins */
+       lm3s_gpioPinConfig(gpio_uart[port].base, gpio_uart[port].pins,
                        GPIO_DIR_MODE_HW, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
 
        /* Set serial param: 115.200 bps, no parity */