diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/lpc176x/pwmout/pwmout.c')
| -rwxr-xr-x | c/src/lib/libbsp/arm/lpc176x/pwmout/pwmout.c | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/c/src/lib/libbsp/arm/lpc176x/pwmout/pwmout.c b/c/src/lib/libbsp/arm/lpc176x/pwmout/pwmout.c deleted file mode 100755 index dc30475f89..0000000000 --- a/c/src/lib/libbsp/arm/lpc176x/pwmout/pwmout.c +++ /dev/null @@ -1,211 +0,0 @@ -/** - * @file pwmout.c - * - * @ingroup lpc176x - * - * @brief PWM-Out controller for the mbed lpc1768 board. - */ - -/* - * Copyright (c) 2014 Taller Technologies. - * - * @author Diaz Marcos (marcos.diaz@tallertechnologies.com) - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <rtems/status-checks.h> -#include <bsp/pwmout.h> -#include <bsp/pwmout-defs.h> - -/** - * @brief The low level device. - */ -static lpc176x_pwm_device *const pwm_device = - (lpc176x_pwm_device *) PWM1_BASE_ADDR; - -/** - * @brief The possible output pins for each PWM output. - */ -static const lpc176x_pwm_pin pwm_pins[ PWM_OUTPUT_NUMBER ][ PWM_NUMBER_OF_PINS -] = -{ - { { 50u, LPC176X_PIN_FUNCTION_10 }, { 64u, LPC176X_PIN_FUNCTION_01 } }, - { { 52u, LPC176X_PIN_FUNCTION_10 }, { 65u, LPC176X_PIN_FUNCTION_01 } }, - { { 53u, LPC176X_PIN_FUNCTION_10 }, { 66u, LPC176X_PIN_FUNCTION_01 } }, - { { 55u, LPC176X_PIN_FUNCTION_10 }, { 67u, LPC176X_PIN_FUNCTION_01 } }, - { { 56u, LPC176X_PIN_FUNCTION_10 }, { 68u, LPC176X_PIN_FUNCTION_01 } }, - { { 58u, LPC176X_PIN_FUNCTION_10 }, { 69u, LPC176X_PIN_FUNCTION_01 } }, -}; - -/** - * @brief The pointers to the low level match registers for each PWM output. - */ -static volatile uint32_t *const pwm_match[ PWM_OUTPUT_NUMBER ] = { - &PWM1MR1, - &PWM1MR2, - &PWM1MR3, - &PWM1MR4, - &PWM1MR5, - &PWM1MR6 -}; - -/** - * @brief Checks if a pin number is valid for the given PWM, - * and sets the corresponding pin function for that pin. - * - * @param pin_number The pin number to search. - * @param pwm In which PWM search for the pin number. - * @param pin_function If the pin number is found, here we return - * the pin function for that pin number. - * @return True if found, false otherwise. - */ -static inline bool is_found_in_this_pwm( - const lpc176x_pin_number pin_number, - const lpc176x_pwm_number pwm, - lpc176x_pin_function *const pin_function -) -{ - lpc176x_pwm_pin_number pnumber = PWM_FIRST_PIN; - bool found = false; - - while (!found && ( pnumber < PWM_NUMBER_OF_PINS )) - { - if ( pwm_pins[ pwm ][ pnumber ].pin_number == pin_number ) { - found = true; - *pin_function = pwm_pins[ pwm ][ pnumber ].pin_function; - }/*else implies that the pin number was not found. Keep looking.*/ - ++pnumber; - } - return found; -} - -/** - * @brief Checks if a pin number is valid for any PWM, - * and sets the corresponding pin function for that pin. - * - * @param pin_number The pin number to search. - * @param pwm If is found here we return in which PWM was found. - * @param pin_function If the pin number is found the pin function - * for this pin number one will be returned. - * @return True if found, false otherwise. - */ -static bool is_valid_pin_number( - const lpc176x_pin_number pin_number, - lpc176x_pwm_number *const pwm, - lpc176x_pin_function *const pin_function -) -{ - bool found = false; - lpc176x_pwm_number pwm_local = PWMO_1; - while(!found && ( pwm_local < PWM_OUTPUT_NUMBER )) - { - if ( is_found_in_this_pwm( pin_number, pwm_local, pin_function ) ) { - *pwm = pwm_local; - found = true; - } /*else implies that the pin number was not found. Keep looking.*/ - ++pwm_local; - } - - return found; -} - -/** - * @brief Sets the period for the given PWM. - * - * @param pwm The PWM output in which the period will be set. - * @param period The period to set. - */ -static void set_period( - const lpc176x_pwm_number pwm, - const lpc176x_microseconds period -) -{ - pwm_device->TCR = PWM_TCR_RESET; - pwm_device->MR0 = period * PWM_PRESCALER_USECOND; - pwm_device->LER |= PWM_LER_LATCH_MATCH_0; - pwm_device->TCR = PWM_TCR_PWM | PWM_TCR_ENABLE; -} - -/** - * @brief Sets the pulsewidth for the given PWM. - * - * @param pwm The PWM output in which the pulsewidth will be set. - * @param pwidth The pulse width to set. - */ -static void set_pulsewidth( - const lpc176x_pwm_number pwm, - lpc176x_microseconds pwidth -) -{ - pwidth *= PWM_PRESCALER_USECOND; - - if ( pwm_device->MR0 == pwidth ) { - ++pwidth; - } /* Not the same as the period, do nothing.*/ - - *( pwm_match[ pwm ] ) = pwidth; - pwm_device->LER |= PWM_LER_LATCH( pwm ); -} - -rtems_status_code pwm_init( const lpc176x_pin_number pin_number ) -{ - rtems_status_code sc = RTEMS_INVALID_NUMBER; - lpc176x_pin_function pin_function; - lpc176x_pwm_number pwm; - - if ( is_valid_pin_number( pin_number, &pwm, &pin_function ) ) { - sc = lpc176x_module_enable( LPC176X_MODULE_PWM_1, - LPC176X_MODULE_PCLK_DEFAULT ); - RTEMS_CHECK_SC( sc, "enable pwm module" ); - - pwm_device->PR = 0; - pwm_device->MCR = PWM_MCR_RESET_ON_MATCH0; - pwm_device->PCR |= PWM_PCR_ENABLE_PWM( pwm ); - - set_period( pwm, PWM_DEFAULT_PERIOD ); - set_pulsewidth( pwm, PWM_DEFAULT_PULSEWIDTH ); - - lpc176x_pin_select( pin_number, pin_function ); - } /* else implies that the pin number is not valid. - So, a RTEMS_INVALID_NUMBER will be returned.*/ - - return sc; -} - -rtems_status_code pwm_period( - const lpc176x_pin_number pin_number, - const lpc176x_microseconds period -) -{ - rtems_status_code sc = RTEMS_INVALID_NUMBER; - lpc176x_pin_function pin_function; - lpc176x_pwm_number pwm; - - if ( is_valid_pin_number( pin_number, &pwm, &pin_function ) ) { - sc = RTEMS_SUCCESSFUL; - set_period( pwm, period ); - } /* else implies that the pin number is not valid. - So, a RTEMS_INVALID_NUMBER will be returned.*/ - - return sc; -} - -rtems_status_code pwm_pulsewidth( - const lpc176x_pin_number pin_number, - const lpc176x_microseconds pwidth -) -{ - rtems_status_code sc = RTEMS_INVALID_NUMBER; - lpc176x_pin_function pin_function; - lpc176x_pwm_number pwm; - - if ( is_valid_pin_number( pin_number, &pwm, &pin_function ) ) { - sc = RTEMS_SUCCESSFUL; - set_pulsewidth( pwm, pwidth ); - } /* Else wrong pin_number return RTEMS_INVALID_NUMBER*/ - - return sc; -} |