diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/rtl22xx/clock/clockdrv.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/rtl22xx/clock/clockdrv.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/c/src/lib/libbsp/arm/rtl22xx/clock/clockdrv.c b/c/src/lib/libbsp/arm/rtl22xx/clock/clockdrv.c deleted file mode 100644 index 3a0cf0a3a1..0000000000 --- a/c/src/lib/libbsp/arm/rtl22xx/clock/clockdrv.c +++ /dev/null @@ -1,177 +0,0 @@ -/* - * LPC22XX/LPC21xx clock specific using the System Timer - * - * Set the Time0 to generate click for RTEMS - */ - -/* - * Copyright (c) 2006 by Ray <rayx.cn@gmail.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.h> -#include <bsp.h> -#include <bsp/irq.h> -#include <lpc22xx.h> -#include <rtems/bspIo.h> /* for printk */ -#include <rtems/timecounter.h> - -void Clock_isr(rtems_irq_hdl_param arg); -static void clock_isr_on(const rtems_irq_connect_data *unused); -static void clock_isr_off(const rtems_irq_connect_data *unused); -static int clock_isr_is_on(const rtems_irq_connect_data *irq); - -static rtems_timecounter_simple lpc22xx_tc; - -static uint32_t lpc22xx_tc_get(rtems_timecounter_simple *tc) -{ - return T0TC; -} - -static bool lpc22xx_tc_is_pending(rtems_timecounter_simple *tc) -{ - return (T0IR & 0x1) != 0; -} - -static uint32_t lpc22xx_tc_get_timecount(struct timecounter *tc) -{ - return rtems_timecounter_simple_upcounter_get( - tc, - lpc22xx_tc_get, - lpc22xx_tc_is_pending - ); -} - -/** - * When we get the clock interrupt - * - clear the interrupt bit? - * - restart the timer? - */ -static void lpc22xx_tc_at_tick(rtems_timecounter_simple *tc) -{ - if (!(T0IR & 0x01)) - return; - T0IR = 0x01; - VICVectAddr = 0x00; -} - -static void lpc22xx_tc_tick(void) -{ - rtems_timecounter_simple_upcounter_tick( - &lpc22xx_tc, - lpc22xx_tc_get, - lpc22xx_tc_at_tick - ); -} - -/* Replace the first value with the clock's interrupt name. */ -rtems_irq_connect_data clock_isr_data = { - .name = LPC22xx_INTERRUPT_TIMER0, - .hdl = Clock_isr, - .handle = NULL, - .on = clock_isr_on, - .off = clock_isr_off, - .isOn = clock_isr_is_on, -}; - -/* use the /shared/clockdrv_shell.h code template */ - -/** - * Installs the clock ISR. You shouldn't need to change this. - */ -#define Clock_driver_support_install_isr( _new ) \ - BSP_install_rtems_irq_handler(&clock_isr_data) - -/** - * Initialize the hardware for the clock - * - Set the frequency - * - enable it - * - clear any pending interrupts - * - * Since you may want the clock always running, you can - * enable interrupts here. If you do so, the clock_isr_on(), - * clock_isr_off(), and clock_isr_is_on() functions can be - * NOPs. - * - * set timer to generate interrupt every - * rtems_configuration_get_microseconds_per_tick() - * MR0/(LPC22xx_Fpclk/(PR0+1)) = 10/1000 = 0.01s - */ -#define Clock_driver_support_initialize_hardware() \ - do { \ - /* disable and clear timer 0, set to */ \ - T0TCR &= 0; \ - /* TC is incremented on every pclk.*/ \ - T0PC = 0; \ - /* initialize the timer period and prescaler */ \ - T0MR0 = ((LPC22xx_Fpclk/1000 * \ - rtems_configuration_get_microseconds_per_tick()) / 1000); \ - /* generate interrupt when T0MR0 match T0TC and Reset Timer Count*/ \ - T0MCR |= 0x03; \ - /* No external match */ \ - T0EMR = 0; \ - /* enable timer0 */ \ - T0TCR = 1; \ - /* enable interrupt, skyeye will check this*/ \ - T0IR |= 0x01; \ - /* install timecounter */ \ - rtems_timecounter_simple_install( \ - &lpc22xx_tc, \ - LPC22xx_Fpclk, \ - T0MR0, \ - lpc22xx_tc_get_timecount \ - ); \ - } while (0) - -/** - * Do whatever you need to shut the clock down and remove the - * interrupt handler. Since this normally only gets called on - * RTEMS shutdown, you may not need to do anything other than - * remove the ISR. - */ -#define Clock_driver_support_shutdown_hardware() \ - do { \ - /* Disable timer */ \ - T0TCR&=~0x02; \ - BSP_remove_rtems_irq_handler(&clock_isr_data); \ - } while (0) - -/** - * Enables clock interrupt. - * - * If the interrupt is always on, this can be a NOP. - */ -static void clock_isr_on(const rtems_irq_connect_data *unused) -{ - T0IR&=0x01; -} - -/** - * Disables clock interrupts - * - * If the interrupt is always on, this can be a NOP. - */ -static void clock_isr_off(const rtems_irq_connect_data *unused) -{ - T0IR=0x00; -} - -/** - * Tests to see if clock interrupt is enabled, and returns 1 if so. - * If interrupt is not enabled, returns 0. - * - * If the interrupt is always on, this always returns 1. - */ -static int clock_isr_is_on(const rtems_irq_connect_data *irq) -{ - return T0IR & 0x01; /* MR0 mask */ -} - -#define Clock_driver_timecounter_tick() lpc22xx_tc_tick() - -/* Make sure to include this, and only at the end of the file */ -#include "../../../../libbsp/shared/clockdrv_shell.h" - |