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Line 60... |
}
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}
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* Enable and configure watchdog timer. The WDT control register bits are listed in #NEORV32_WDT_CT_enum.
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* Configure and enable watchdog timer. The WDT control register bits are listed in #NEORV32_WDT_CT_enum.
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*
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*
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* @param[in] clk_prsc Clock prescaler to selet timeout interval. See #NEORV32_CLOCK_PRSC_enum.
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* @param[in] prsc Clock prescaler to selet timeout interval. See #NEORV32_CLOCK_PRSC_enum.
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* @param[in] timeout_mode Trigger system reset on timeout when 1, trigger interrupt on timeout when 0.
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* @param[in] mode Trigger system reset on timeout when 1, trigger interrupt on timeout when 0.
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* @param[in] lock Control register will be locked when 1 (unitl next reset).
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**************************************************************************/
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**************************************************************************/
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void neorv32_wdt_setup(uint8_t clk_prsc, uint8_t timeout_mode) {
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void neorv32_wdt_setup(uint8_t prsc, uint8_t mode, uint8_t lock) {
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uint32_t prsc = (uint32_t)(clk_prsc & 0x07);
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WDT_CT = (1 << WDT_CT_RESET); // reset WDT counter
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prsc = prsc << WDT_CT_CLK_SEL0;
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uint32_t mode = (uint32_t)(timeout_mode & 0x01);
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uint32_t prsc_int = (uint32_t)(prsc & 0x07);
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mode = mode << WDT_CT_MODE;
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prsc_int = prsc_int << WDT_CT_CLK_SEL0;
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uint32_t password = (uint32_t)(WDT_PASSWORD);
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uint32_t mode_int = (uint32_t)(mode & 0x01);
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password = password << WDT_CT_PASSWORD_LSB;
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mode_int = mode_int << WDT_CT_MODE;
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uint32_t enable = (uint32_t)(1 << WDT_CT_EN);
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uint32_t lock_int = (uint32_t)(lock & 0x01);
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lock_int = lock_int << WDT_CT_LOCK;
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WDT_CT = password | enable | mode | prsc;
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const uint32_t enable = (uint32_t)(1 << WDT_CT_EN);
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// update WDT control register
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WDT_CT = enable | mode_int | prsc_int | lock_int;
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* Disable watchdog timer.
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* Disable watchdog timer.
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*
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* @return Returns 0 if WDT is really deativated, -1 otherwise.
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**************************************************************************/
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**************************************************************************/
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void neorv32_wdt_disable(void) {
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int neorv32_wdt_disable(void) {
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WDT_CT = ((uint32_t)(WDT_PASSWORD << WDT_CT_PASSWORD_LSB)) | ((uint32_t)(0 << WDT_CT_EN));
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WDT_CT = 0;
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// check if wdt is really off
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if (WDT_CT & (1 << WDT_CT_EN)) {
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return -1; // WDT still active
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}
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else {
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return 0;
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}
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* Reset (running) watchdog.
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* Reset (running) watchdog.
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**************************************************************************/
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**************************************************************************/
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void neorv32_wdt_reset(void) {
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void neorv32_wdt_reset(void) {
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WDT_CT = WDT_CT | ((uint32_t)(WDT_PASSWORD << WDT_CT_PASSWORD_LSB));
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WDT_CT = (1 << WDT_CT_RESET);
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
|
* Get cause of last watchdog action.
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* Get cause of last system reset.
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*
|
*
|
* @return Cause of last reset/IRQ (0: undefined, 1: external reset, 2: watchdog timeout, 3: watchdog access error (wrong password)).
|
* @return Cause of last reset/IRQ (0: external reset, 1: watchdog timeout).
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**************************************************************************/
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**************************************************************************/
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uint8_t neorv32_wdt_get_cause(void) {
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int neorv32_wdt_get_cause(void) {
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|
|
uint8_t cause = 0;
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if (WDT_CT & (1 << WDT_CT_RCAUSE)) { // reset caused by watchdog
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uint32_t ctrl = WDT_CT;
|
return 1;
|
if (ctrl & (1 << WDT_CT_CAUSE)) { // reset/IRQ casued by watchdog
|
|
if (ctrl & (1 << WDT_CT_PWFAIL)) { // reset/IRQ due to wrong password
|
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cause = 3;
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}
|
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else { // reset/IRQ due to timeout
|
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cause = 2;
|
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}
|
|
}
|
}
|
else { // external reset
|
else { // external reset
|
cause = 1;
|
return 0;
|
}
|
}
|
return cause;
|
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}
|
}
|
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|
|
|
/**********************************************************************//**
|
/**********************************************************************//**
|
* Force watchdog action (reset/IRQ) via wrong-password access.
|
* Force immediate watchdog action (reset/IRQ).
|
**************************************************************************/
|
**************************************************************************/
|
void neorv32_wdt_force(void) {
|
void neorv32_wdt_force(void) {
|
|
|
WDT_CT = 0; // invalid access
|
WDT_CT = WDT_CT | (1 << WDT_CT_FORCE);
|
}
|
}
|
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No newline at end of file
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No newline at end of file
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