/*---------------------------------------------------------------------------*/
void
felicia_spi_init(void)
{
/* Initialize ring buffers for RX and TX data */
ringbuf_init(&spi_rx_buf, rxbuf_data, sizeof(rxbuf_data));
ringbuf_init(&spi_tx_buf, txbuf_data, sizeof(txbuf_data));
/* Configre SSI interface and init TX FIFO */
ssi_reconfigure(1);
/* Set the mux correctly to connect the SSI pins to the correct GPIO pins */
/* set input pin with ioc */
REG(IOC_CLK_SSIIN_SSI0) = ioc_input_sel(SPI_CLK_PORT, SPI_CLK_PIN);
REG(IOC_SSIFSSIN_SSI0) = ioc_input_sel(SPI_SEL_PORT, SPI_SEL_PIN);
REG(IOC_SSIRXD_SSI0) = ioc_input_sel(SPI_MOSI_PORT, SPI_MOSI_PIN);
/* set output pin */
ioc_set_sel(SPI_MISO_PORT, SPI_MISO_PIN, IOC_PXX_SEL_SSI0_TXD);
/* Set pins as input and MISo as output */
GPIO_SET_INPUT(SPI_CLK_PORT_BASE, SPI_CLK_PIN_MASK);
GPIO_SET_INPUT(SPI_MOSI_PORT_BASE, SPI_MOSI_PIN_MASK);
GPIO_SET_INPUT(SPI_SEL_PORT_BASE, SPI_SEL_PIN_MASK); /* it seems that setting SEL as input is not necessary */
GPIO_SET_OUTPUT(SPI_MISO_PORT_BASE, SPI_MISO_PIN_MASK);
/* Put all the SSI gpios into peripheral mode */
GPIO_PERIPHERAL_CONTROL(SPI_CLK_PORT_BASE, SPI_CLK_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_MOSI_PORT_BASE, SPI_MOSI_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_MISO_PORT_BASE, SPI_MISO_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_SEL_PORT_BASE, SPI_SEL_PIN_MASK); /* it seems that setting SEL: as peripheral controlled is not necessary */
/* Disable any pull ups or the like */
ioc_set_over(SPI_CLK_PORT, SPI_CLK_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_MOSI_PORT, SPI_MOSI_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_MISO_PORT, SPI_MISO_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_SEL_PORT, SPI_SEL_PIN, IOC_OVERRIDE_PDE); /* it seems that configuring pull-ups/downs on SEL is not necessary */
/* Configure output INT pin (from Felicia to Host */
GPIO_SET_OUTPUT(SPI_INT_PORT_BASE, SPI_INT_PIN_MASK);
GPIO_CLR_PIN(SPI_INT_PORT_BASE, SPI_INT_PIN_MASK);
/* Configure CS pin and detection for both edges on that pin */
GPIO_SOFTWARE_CONTROL(SPI_CS_PORT_BASE, SPI_CS_PIN_MASK);
GPIO_SET_INPUT(SPI_CS_PORT_BASE, SPI_CS_PIN_MASK);
GPIO_DETECT_EDGE(SPI_CS_PORT_BASE, SPI_CS_PIN_MASK);
GPIO_TRIGGER_BOTH_EDGES(SPI_CS_PORT_BASE, SPI_CS_PIN_MASK);
GPIO_ENABLE_INTERRUPT(SPI_CS_PORT_BASE, SPI_CS_PIN_MASK);
ioc_set_over(SPI_CS_PORT, SPI_CS_PIN, IOC_OVERRIDE_PUE);
/* Enable interrupt form CS pin */
nvic_interrupt_enable(NVIC_INT_GPIO_PORT_B);
gpio_register_callback(cs_isr, SPI_CS_PORT, SPI_CS_PIN);
}
/*---------------------------------------------------------------------------*/
void
i2c_init(uint8_t port_sda, uint8_t pin_sda, uint8_t port_scl, uint8_t pin_scl,
uint32_t bus_speed)
{
/* Enable I2C clock in different modes */
REG(SYS_CTRL_RCGCI2C) |= 1; /* Run mode */
/* Reset I2C peripheral */
REG(SYS_CTRL_SRI2C) |= 1; /* Reset position */
/* Delay for a little bit */
clock_delay_usec(50);
REG(SYS_CTRL_SRI2C) &= ~1; /* Normal position */
/* Set pins in input */
GPIO_SET_INPUT(GPIO_PORT_TO_BASE(port_sda), GPIO_PIN_MASK(pin_sda));
GPIO_SET_INPUT(GPIO_PORT_TO_BASE(port_scl), GPIO_PIN_MASK(pin_scl));
/* Set peripheral control for the pins */
GPIO_PERIPHERAL_CONTROL(GPIO_PORT_TO_BASE(port_sda), GPIO_PIN_MASK(pin_sda));
GPIO_PERIPHERAL_CONTROL(GPIO_PORT_TO_BASE(port_scl), GPIO_PIN_MASK(pin_scl));
/* Set the pad to no drive type */
ioc_set_over(port_sda, pin_sda, IOC_OVERRIDE_DIS);
ioc_set_over(port_scl, pin_scl, IOC_OVERRIDE_DIS);
/* Set pins as peripheral inputs */
REG(IOC_I2CMSSDA) = ioc_input_sel(port_sda, pin_sda);
REG(IOC_I2CMSSCL) = ioc_input_sel(port_scl, pin_scl);
/* Set pins as peripheral outputs */
ioc_set_sel(port_sda, pin_sda, IOC_PXX_SEL_I2C_CMSSDA);
ioc_set_sel(port_scl, pin_scl, IOC_PXX_SEL_I2C_CMSSCL);
/* Enable the I2C master module */
i2c_master_enable();
/* t the master clock frequency */
i2c_set_frequency(bus_speed);
}
/**
* \brief Initialize the SPI bus.
*
* This SPI init() function uses the following defines to set the pins:
* SPI_CLK_PORT SPI_CLK_PIN
* SPI_MOSI_PORT SPI_MOSI_PIN
* SPI_MISO_PORT SPI_MISO_PIN
*
* This sets the mode to Motorola SPI with the following format options:
* Clock phase: 1; data captured on second (rising) edge
* Clock polarity: 1; clock is high when idle
* Data size: 8 bits
*/
void
spi_init(void)
{
spi_enable();
/* Start by disabling the peripheral before configuring it */
REG(SSI0_BASE + SSI_CR1) = 0;
/* Set the IO clock as the SSI clock */
REG(SSI0_BASE + SSI_CC) = 1;
/* Set the mux correctly to connect the SSI pins to the correct GPIO pins */
ioc_set_sel(SPI_CLK_PORT, SPI_CLK_PIN, IOC_PXX_SEL_SSI0_CLKOUT);
ioc_set_sel(SPI_MOSI_PORT, SPI_MOSI_PIN, IOC_PXX_SEL_SSI0_TXD);
REG(IOC_SSIRXD_SSI0) = (SPI_MISO_PORT * 8) + SPI_MISO_PIN;
/* Put all the SSI gpios into peripheral mode */
GPIO_PERIPHERAL_CONTROL(SPI_CLK_PORT_BASE, SPI_CLK_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_MOSI_PORT_BASE, SPI_MOSI_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_MISO_PORT_BASE, SPI_MISO_PIN_MASK);
/* Disable any pull ups or the like */
ioc_set_over(SPI_CLK_PORT, SPI_CLK_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_MOSI_PORT, SPI_MOSI_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_MISO_PORT, SPI_MISO_PIN, IOC_OVERRIDE_DIS);
/* Configure the clock */
REG(SSI0_BASE + SSI_CPSR) = 2;
/* Configure the default SPI options.
* mode: Motorola frame format
* clock: High when idle
* data: Valid on rising edges of the clock
* bits: 8 byte data
*/
REG(SSI0_BASE + SSI_CR0) = SSI_CR0_SPH | SSI_CR0_SPO | (0x07);
/* Enable the SSI */
REG(SSI0_BASE + SSI_CR1) |= SSI_CR1_SSE;
}
/**
* \brief Initialize the SPI bus.
*
* This SPI init() function uses the following #defines to set the pins:
* SPI_CLK_PORT SPI_CLK_PIN
* SPI_MOSI_PORT SPI_MOSI_PIN
* SPI_MISO_PORT SPI_MISO_PIN
* SPI_SEL_PORT SPI_SEL_PIN
*
* This sets the mode to Motorola SPI with the following format options:
* SPI_CONF_PHASE: 0 or SSI_CR0_SPH
* SPI_CONF_POLARITY: 0 or SSI_CR0_SPO
* SPI_CONF_DATA_SIZE: 4 to 16 bits
*/
void
spi_init(void)
{
spi_enable();
/* Start by disabling the peripheral before configuring it */
REG(SSI0_BASE + SSI_CR1) = 0;
/* Set the IO clock as the SSI clock */
REG(SSI0_BASE + SSI_CC) = 1;
/* Set the mux correctly to connect the SSI pins to the correct GPIO pins */
ioc_set_sel(SPI_CLK_PORT, SPI_CLK_PIN, IOC_PXX_SEL_SSI0_CLKOUT);
ioc_set_sel(SPI_MOSI_PORT, SPI_MOSI_PIN, IOC_PXX_SEL_SSI0_TXD);
REG(IOC_SSIRXD_SSI0) = (SPI_MISO_PORT * 8) + SPI_MISO_PIN;
ioc_set_sel(SPI_SEL_PORT, SPI_SEL_PIN, IOC_PXX_SEL_SSI0_FSSOUT);
/* Put all the SSI gpios into peripheral mode */
GPIO_PERIPHERAL_CONTROL(SPI_CLK_PORT_BASE, SPI_CLK_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_MOSI_PORT_BASE, SPI_MOSI_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_MISO_PORT_BASE, SPI_MISO_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_SEL_PORT_BASE, SPI_SEL_PIN_MASK);
/* Disable any pull ups or the like */
ioc_set_over(SPI_CLK_PORT, SPI_CLK_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_MOSI_PORT, SPI_MOSI_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_MISO_PORT, SPI_MISO_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_SEL_PORT, SPI_SEL_PIN, IOC_OVERRIDE_DIS);
/* Configure the clock */
REG(SSI0_BASE + SSI_CPSR) = 2;
/* Put the ssi in Motorola SPI mode using the provided format options */
REG(SSI0_BASE + SSI_CR0) = SPI_CONF_PHASE | SPI_CONF_POLARITY | (SPI_CONF_DATA_SIZE - 1);
/* Enable the SSI */
REG(SSI0_BASE + SSI_CR1) |= SSI_CR1_SSE;
}
//Config PA1 as an PWM output pin
void initPWM()
{
//Timer is 16Mhz
/* Enable module clock for the GPTx in Active mode, GPT0 clock enable, CPU running */
REG(SYS_CTRL_RCGCGPT) |= SYS_CTRL_RCGCGPT_GPT0;
disable_gptimer();
/* Use 16-bit timer */
REG(GPT_CONF_BASE + GPTIMER_CFG) = 0x04;
/* Configure PWM mode, 0x00000008 Timer A alternate mode. */
REG(GPT_CONF_BASE + GPTIMER_TAMR) = 0;
REG(GPT_CONF_BASE + GPTIMER_TAMR) |= GPTIMER_TAMR_TAAMS;
/* To enable PWM mode, the TACM bit must be cleared and the lowest 2 bits
(TAMR) field must be configured to 0x2.
GPTIMER_TnMR bit values, GPTIMER_TAMR_TAMR_PERIODIC is 0x00000002 */
REG(GPT_CONF_BASE + GPTIMER_TAMR) |= GPTIMER_TAMR_TAMR_PERIODIC;
//how often the counter is incremented: every pre-scaler / clock 16000000 seconds
REG(GPT_CONF_BASE + GPTIMER_TAPR) = 0; //PRESCALER_VALUE
/* Set the start value (period), count down */
REG(GPT_CONF_BASE+ GPTIMER_TAILR) = 16000; //frequency: 1kHz. 16000: 3E80, 16000000:F42400
/* Set the deassert period */
REG(GPT_CONF_BASE + GPTIMER_TAMATCHR) = 12800; //duty cycle: 20% so vibrator time is 20%. 800: 0x1F40, 8000000: 7A1200
// Defined in contiki/cpu/cc2538/dev/ioc.h
/* Function select for Port:Pin.
The third param sel can be any of the IOC_PXX_SEL_xyz defines.
For example, IOC_PXX_SEL_UART0_TXD will set the port to act as UART0 TX.
Selects one of the 32 pins on the four 8-pin I/O-ports (port A, port B, port C, and port D) to be the GPT0OCP1.
Configure pin : PA:1 selected as GPT0OCP1*/
ioc_set_sel(PWM_GPIO_CONF_PORT, PWM_GPIO_CONF_PIN, IOC_CONF_SEL);
/* Set Port:Pin override function, IOC_OVERRIDE_OE: Output */
ioc_set_over(PWM_GPIO_CONF_PORT, PWM_GPIO_CONF_PIN, IOC_OVERRIDE_OE);
/* Configure the pin to be under peripheral control with PIN_MASK of port with PORT_BASE.*/
GPIO_PERIPHERAL_CONTROL(GPIO_PORT_TO_BASE(PWM_GPIO_CONF_PORT), GPIO_PIN_MASK(PWM_GPIO_CONF_PIN));
enable_gptimer();
}
/*---------------------------------------------------------------------------*/
void
uart_init(uint8_t uart)
{
const uart_regs_t *regs;
if(uart >= UART_INSTANCE_COUNT) {
return;
}
regs = &uart_regs[uart];
if(regs->rx.port < 0 || regs->tx.port < 0) {
return;
}
lpm_register_peripheral(permit_pm1);
/* Enable clock for the UART while Running, in Sleep and Deep Sleep */
REG(SYS_CTRL_RCGCUART) |= regs->sys_ctrl_rcgcuart_uart;
REG(SYS_CTRL_SCGCUART) |= regs->sys_ctrl_scgcuart_uart;
REG(SYS_CTRL_DCGCUART) |= regs->sys_ctrl_dcgcuart_uart;
/* Run on SYS_DIV */
REG(regs->base | UART_CC) = 0;
/*
* Select the UARTx RX pin by writing to the IOC_UARTRXD_UARTn register
*
* The value to be written will be on of the IOC_INPUT_SEL_Pxn defines from
* ioc.h. The value can also be calculated as:
*
* (port << 3) + pin
*/
REG(regs->ioc_uartrxd_uart) = (regs->rx.port << 3) + regs->rx.pin;
/*
* Pad Control for the TX pin:
* - Set function to UARTn TX
* - Output Enable
*/
ioc_set_sel(regs->tx.port, regs->tx.pin, regs->ioc_pxx_sel_uart_txd);
ioc_set_over(regs->tx.port, regs->tx.pin, IOC_OVERRIDE_OE);
/* Set RX and TX pins to peripheral mode */
GPIO_PERIPHERAL_CONTROL(GPIO_PORT_TO_BASE(regs->tx.port),
GPIO_PIN_MASK(regs->tx.pin));
GPIO_PERIPHERAL_CONTROL(GPIO_PORT_TO_BASE(regs->rx.port),
GPIO_PIN_MASK(regs->rx.pin));
/*
* UART Interrupt Masks:
* Acknowledge RX and RX Timeout
* Acknowledge Framing, Overrun and Break Errors
*/
REG(regs->base | UART_IM) = UART_IM_RXIM | UART_IM_RTIM;
REG(regs->base | UART_IM) |= UART_IM_OEIM | UART_IM_BEIM | UART_IM_FEIM;
REG(regs->base | UART_IFLS) =
UART_IFLS_RXIFLSEL_1_8 | UART_IFLS_TXIFLSEL_1_2;
/* Make sure the UART is disabled before trying to configure it */
REG(regs->base | UART_CTL) = UART_CTL_VALUE;
/* Baud Rate Generation */
REG(regs->base | UART_IBRD) = regs->ibrd;
REG(regs->base | UART_FBRD) = regs->fbrd;
/* UART Control: 8N1 with FIFOs */
REG(regs->base | UART_LCRH) = UART_LCRH_WLEN_8 | UART_LCRH_FEN;
/*
* Enable hardware flow control (RTS/CTS) if requested.
* Note that hardware flow control is available only on UART1.
*/
if(regs->cts.port >= 0) {
REG(IOC_UARTCTS_UART1) = ioc_input_sel(regs->cts.port, regs->cts.pin);
GPIO_PERIPHERAL_CONTROL(GPIO_PORT_TO_BASE(regs->cts.port), GPIO_PIN_MASK(regs->cts.pin));
ioc_set_over(regs->cts.port, regs->cts.pin, IOC_OVERRIDE_DIS);
REG(UART_1_BASE | UART_CTL) |= UART_CTL_CTSEN;
}
if(regs->rts.port >= 0) {
ioc_set_sel(regs->rts.port, regs->rts.pin, IOC_PXX_SEL_UART1_RTS);
GPIO_PERIPHERAL_CONTROL(GPIO_PORT_TO_BASE(regs->rts.port), GPIO_PIN_MASK(regs->rts.pin));
ioc_set_over(regs->rts.port, regs->rts.pin, IOC_OVERRIDE_OE);
REG(UART_1_BASE | UART_CTL) |= UART_CTL_RTSEN;
}
/* UART Enable */
REG(regs->base | UART_CTL) |= UART_CTL_UARTEN;
/* Enable UART0 Interrupts */
nvic_interrupt_enable(regs->nvic_int);
}
/*---------------------------------------------------------------------------*/
void
uart_init(void)
{
lpm_register_peripheral(permit_pm1);
/* Enable clock for the UART while Running, in Sleep and Deep Sleep */
REG(SYS_CTRL_RCGCUART) |= SYS_CTRL_RCGCUART_UART;
REG(SYS_CTRL_SCGCUART) |= SYS_CTRL_SCGCUART_UART;
REG(SYS_CTRL_DCGCUART) |= SYS_CTRL_DCGCUART_UART;
/* Run on SYS_DIV */
REG(UART_BASE | UART_CC) = 0;
/*
* Select the UARTx RX pin by writing to the IOC_UARTRXD_UARTn register
*
* The value to be written will be on of the IOC_INPUT_SEL_Pxn defines from
* ioc.h. The value can also be calculated as:
*
* (port << 3) + pin
*/
REG(IOC_UARTRXD_UART) = (UART_RX_PORT << 3) + UART_RX_PIN;
/*
* Pad Control for the TX pin:
* - Set function to UART0 TX
* - Output Enable
*/
ioc_set_sel(UART_TX_PORT, UART_TX_PIN, IOC_PXX_SEL_UART_TXD);
ioc_set_over(UART_TX_PORT, UART_TX_PIN, IOC_OVERRIDE_OE);
/* Set RX and TX pins to peripheral mode */
GPIO_PERIPHERAL_CONTROL(UART_TX_PORT_BASE, UART_TX_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(UART_RX_PORT_BASE, UART_RX_PIN_MASK);
/*
* UART Interrupt Masks:
* Acknowledge RX and RX Timeout
* Acknowledge Framing, Overrun and Break Errors
*/
REG(UART_BASE | UART_IM) = UART_IM_RXIM | UART_IM_RTIM;
REG(UART_BASE | UART_IM) |= UART_IM_OEIM | UART_IM_BEIM | UART_IM_FEIM;
REG(UART_BASE | UART_IFLS) =
UART_IFLS_RXIFLSEL_1_8 | UART_IFLS_TXIFLSEL_1_2;
/* Make sure the UART is disabled before trying to configure it */
REG(UART_BASE | UART_CTL) = UART_CTL_TXE | UART_CTL_RXE;
/* Baud Rate Generation */
REG(UART_BASE | UART_IBRD) = UART_CONF_IBRD;
REG(UART_BASE | UART_FBRD) = UART_CONF_FBRD;
/* UART Control: 8N1 with FIFOs */
REG(UART_BASE | UART_LCRH) = UART_LCRH_WLEN_8 | UART_LCRH_FEN;
/* UART Enable */
REG(UART_BASE | UART_CTL) |= UART_CTL_UARTEN;
/* Enable UART0 Interrupts */
nvic_interrupt_enable(NVIC_INT_UART);
}
