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rt-thread-official/bsp/nuvoton/libraries/nuc980/rtt_port/drv_adc.c

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/**************************************************************************//**
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-12-12 Wayne First version
*
******************************************************************************/
#include <rtconfig.h>
#if defined(BSP_USING_ADC)
#include <rtdevice.h>
#include "NuMicro.h"
#include "drv_sys.h"
#include "nu_bitutil.h"
#include "drv_adc.h"
/* Private define ---------------------------------------------------------------*/
#define DEF_ADC_TOUCH_SMPL_TICK 40
#define TOUCH_MQ_LENGTH 64
/* Private Typedef --------------------------------------------------------------*/
struct nu_adc
{
struct rt_adc_device dev;
char *name;
ADC_T *base;
uint32_t bReset;
IRQn_Type irqn;
E_SYS_IPRST rstidx;
E_SYS_IPCLK clkidx;
uint32_t chn_mask;
rt_sem_t m_psSem;
#if defined(BSP_USING_ADC_TOUCH)
rt_touch_t psRtTouch;
rt_timer_t psRtTouchMenuTimer;
rt_mq_t m_pmqTouchXYZ;
#endif
nu_adc_cb m_isr[eAdc_ISR_CNT];
nu_adc_cb m_wkisr[eAdc_WKISR_CNT];
};
typedef struct nu_adc *nu_adc_t;
#if defined(BSP_USING_ADC_TOUCH)
struct nu_adc_touch_data
{
uint32_t u32X;
uint32_t u32Y;
uint32_t u32Z0;
uint32_t u32Z1;
};
typedef struct nu_adc_touch_data *nu_adc_touch_data_t;
#endif
/* Private functions ------------------------------------------------------------*/
static rt_err_t nu_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled);
static rt_err_t nu_adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value);
static rt_err_t _nu_adc_control(rt_device_t dev, int cmd, void *args);
/* Public functions ------------------------------------------------------------*/
int rt_hw_adc_init(void);
/* Private variables ------------------------------------------------------------*/
static struct nu_adc g_sNuADC =
{
.name = "adc",
.base = (ADC_T *)ADC_BA,
.bReset = 1,
.irqn = IRQ_ADC,
.rstidx = ADCRST,
.clkidx = ADCCKEN,
.chn_mask = 0
};
static void nu_adc_isr(int vector, void *param)
{
volatile rt_int32_t isr, wkisr;
nu_adc_t psNuAdc = (nu_adc_t)param;
rt_int32_t irqidx;
ADC_T *adc = psNuAdc->base;
//rt_kprintf("[%s %d] CTL: %08x CONF:%08x IER:%08x ISR:%08x\n", __func__, __LINE__, adc->CTL, adc->CONF, adc->IER, adc->ISR);
isr = adc->ISR;
wkisr = adc->WKISR;
adc->ISR = isr;
while ((irqidx = nu_ctz(isr)) < eAdc_ISR_CNT)
{
uint32_t u32IsrBitMask = 1 << irqidx ;
if (psNuAdc->m_isr[irqidx].cbfunc != RT_NULL)
{
// rt_kprintf("[%s] %d %x\n", __func__, irqidx, psNuAdc->m_isr[irqidx].cbfunc);
psNuAdc->m_isr[irqidx].cbfunc(isr, psNuAdc->m_isr[irqidx].private_data);
}
/* Clear sent bit */
isr &= ~(u32IsrBitMask);
} //while
while ((irqidx = nu_ctz(wkisr)) < eAdc_WKISR_CNT)
{
uint32_t u32IsrBitMask = 1 << irqidx ;
if (psNuAdc->m_wkisr[irqidx].cbfunc != RT_NULL)
{
psNuAdc->m_wkisr[irqidx].cbfunc(wkisr, psNuAdc->m_wkisr[irqidx].private_data);
}
wkisr &= ~(u32IsrBitMask);
} //while
}
#define DEF_ADC_SRC_CLOCK_DIV (12000 / 1000)
static rt_err_t _nu_adc_init(rt_device_t dev)
{
nu_adc_t psNuAdc = (nu_adc_t)dev;
/* Set ADC Engine Clock */
outpw(REG_CLK_DIVCTL7, inpw(REG_CLK_DIVCTL7) & ~((0x3 << 19) | (0x7 << 16) | (0xFFul << 24)));
outpw(REG_CLK_DIVCTL7, (0 << 19) | (0 << 16) | ((DEF_ADC_SRC_CLOCK_DIV - 1) << 24));
/* Install interrupt service routine */
rt_hw_interrupt_install(psNuAdc->irqn, nu_adc_isr, (void *)psNuAdc, psNuAdc->name);
return RT_EOK;
}
#define ADC_TOUCH_Z0_ACTIVE 20
static int32_t AdcMenuStartCallback(uint32_t status, uint32_t userData)
{
nu_adc_t psNuAdc = (nu_adc_t)userData;
#if defined(BSP_USING_ADC_TOUCH)
ADC_T *adc = psNuAdc->base;
static struct nu_adc_touch_data point;
static rt_bool_t bDrop = RT_FALSE;
static uint32_t u32LastZ0 = 0xffffu;
if (psNuAdc->psRtTouch != RT_NULL)
{
point.u32X = ADC_GET_CONVERSION_XDATA(adc);
point.u32Y = ADC_GET_CONVERSION_YDATA(adc);
point.u32Z0 = ADC_GET_CONVERSION_Z1DATA(adc);
point.u32Z1 = ADC_GET_CONVERSION_Z2DATA(adc);
//rt_kprintf("x=%d y=%d z0=%d z1=%d\n", point.u32X, point.u32Y, point.u32Z0, point.u32Z1);
/* Trigger next or not. */
if (point.u32Z0 < ADC_TOUCH_Z0_ACTIVE)
{
/* Stop sampling procedure. */
rt_timer_stop(g_sNuADC.psRtTouchMenuTimer);
/* Re-start pendown detection */
nu_adc_touch_detect(RT_TRUE);
psNuAdc->bReset = 1;
bDrop = RT_TRUE;
}
else
{
bDrop = RT_FALSE;
}
/* Notify upper layer. */
if ((!bDrop || (u32LastZ0 > ADC_TOUCH_Z0_ACTIVE)) && rt_mq_send(psNuAdc->m_pmqTouchXYZ, (const void *)&point, sizeof(struct nu_adc_touch_data)) == RT_EOK)
{
rt_hw_touch_isr(psNuAdc->psRtTouch);
}
u32LastZ0 = point.u32Z0;
}
else
#endif
{
rt_err_t result = rt_sem_release(psNuAdc->m_psSem);
RT_ASSERT(result == RT_EOK);
}
return 0;
}
#if defined(BSP_USING_ADC_TOUCH)
static void nu_adc_touch_antiglitch(ADC_T *adc)
{
int count = 10;
do
{
rt_hw_us_delay(1000); // 1ms
ADC_CLR_INT_FLAG(adc, adc->ISR);
if (adc->ISR == 0)
break;
}
while (count-- > 0);
}
void nu_adc_touch_detect(rt_bool_t bStartDetect)
{
nu_adc_t psNuAdc = (nu_adc_t)&g_sNuADC;
ADC_T *adc = psNuAdc->base;
/* Disable interrupt */
rt_hw_interrupt_mask(psNuAdc->irqn);
ADC_POWER_DOWN(adc);
/* Disable interrupt */
ADC_DISABLE_INT(adc, ADC_IER_PEDEIEN_Msk | ADC_IER_MIEN_Msk);
nu_adc_touch_antiglitch(adc);
if (bStartDetect == RT_TRUE)
{
/* Switch to PenDown detection mode */
ADC_DETECT_PD_MODE(adc);
nu_adc_touch_antiglitch(adc);
/* Enable interrupt */
ADC_ENABLE_INT(adc, ADC_IER_PEDEIEN_Msk);
}
else
{
/* Switch to XY coordination converting mode */
ADC_CONVERT_XY_MODE(adc);
nu_adc_touch_antiglitch(adc);
/* Enable interrupt */
ADC_ENABLE_INT(adc, ADC_IER_MIEN_Msk);
}
ADC_POWER_ON(adc);
/* Enable interrupt */
rt_hw_interrupt_umask(psNuAdc->irqn);
}
static int32_t PenDownCallback(uint32_t status, uint32_t userData)
{
nu_adc_t psNuAdc = (nu_adc_t)userData;
return rt_timer_start(psNuAdc->psRtTouchMenuTimer);
}
int32_t nu_adc_touch_read_xyz(uint32_t *bufX, uint32_t *bufY, uint32_t *bufZ0, uint32_t *bufZ1, int32_t dataCnt)
{
int i;
struct nu_adc_touch_data value;
for (i = 0 ; i < dataCnt; i++)
{
if (rt_mq_recv(g_sNuADC.m_pmqTouchXYZ, (void *)&value, sizeof(struct nu_adc_touch_data), 0) == -RT_ETIMEOUT)
break;
bufX[i] = value.u32X;
bufY[i] = value.u32Y;
bufZ0[i] = value.u32Z0;
bufZ1[i] = value.u32Z1;
}
return i;
}
rt_err_t nu_adc_touch_enable(rt_touch_t psRtTouch)
{
nu_adc_t psNuAdc = (nu_adc_t)&g_sNuADC;
nu_adc_cb sNuAdcCb;
ADC_T *adc = psNuAdc->base;
adc->CONF = 0x0;
rt_adc_enable((rt_adc_device_t)psNuAdc, 4); //Channel number 4
rt_adc_enable((rt_adc_device_t)psNuAdc, 5); //Channel number 5
rt_adc_enable((rt_adc_device_t)psNuAdc, 6); //Channel number 6
rt_adc_enable((rt_adc_device_t)psNuAdc, 7); //Channel number 7
/* Register touch device. */
psNuAdc->psRtTouch = psRtTouch;
/* Register PenDown callback. */
sNuAdcCb.cbfunc = PenDownCallback;
sNuAdcCb.private_data = (rt_uint32_t)psNuAdc;
rt_memcpy(&psNuAdc->m_isr[eAdc_PEDEF], &sNuAdcCb, sizeof(nu_adc_cb));
nu_adc_touch_detect(RT_TRUE);
return RT_EOK;
}
rt_err_t nu_adc_touch_disable(void)
{
nu_adc_t psNuAdc = (nu_adc_t)&g_sNuADC;
nu_adc_touch_detect(RT_FALSE);
_nu_adc_control((rt_device_t)psNuAdc, T_OFF, RT_NULL);
_nu_adc_control((rt_device_t)psNuAdc, Z_OFF, RT_NULL);
_nu_adc_control((rt_device_t)psNuAdc, PEDEF_OFF, RT_NULL);
rt_adc_disable((rt_adc_device_t)psNuAdc, 4); //Channel number 4
rt_adc_disable((rt_adc_device_t)psNuAdc, 5); //Channel number 5
rt_adc_disable((rt_adc_device_t)psNuAdc, 6); //Channel number 6
rt_adc_disable((rt_adc_device_t)psNuAdc, 7); //Channel number 7
return RT_EOK;
}
static void nu_adc_touch_smpl(void *p)
{
nu_adc_t psNuAdc = (nu_adc_t)p;
if (psNuAdc->bReset)
{
psNuAdc->bReset = 0;
nu_adc_touch_detect(RT_FALSE);
}
/* Start conversion */
ADC_START_CONV(psNuAdc->base);
}
#endif
static rt_err_t _nu_adc_control(rt_device_t dev, int cmd, void *args)
{
rt_err_t ret = RT_EINVAL ;
nu_adc_t psNuAdc = (nu_adc_t)dev;
ADC_T *adc = psNuAdc->base;
nu_adc_cb_t psAdcCb = (nu_adc_cb_t)args;
switch (cmd)
{
case START_MST: /* Menu Start Conversion */
{
/* Enable interrupt */
ADC_ENABLE_INT(adc, ADC_IER_MIEN_Msk);
/* Start conversion */
ADC_START_CONV(adc);
/* Wait it done */
ret = rt_sem_take(psNuAdc->m_psSem, RT_WAITING_FOREVER);
RT_ASSERT(ret == RT_EOK);
/* Get data: valid data is 12-bit */
if (args != RT_NULL)
*((uint32_t *)args) = ADC_GET_CONVERSION_DATA(adc, 0);
}
break;
case WKT_ON: /* Enable Touch Wake Up */
{
if (psAdcCb)
{
rt_memcpy(&psNuAdc->m_wkisr[eAdc_WPEDEF], psAdcCb, sizeof(nu_adc_cb));
}
adc->CTL |= ADC_CTL_WKTEN_Msk;
adc->IER |= ADC_IER_WKTIEN_Msk;
//TODO outpw(REG_SYS_WKUPSER, inpw(REG_SYS_WKUPSER) | (1 << 26));
}
break;
case WKT_OFF: /* Disable Touch Wake Up */
{
adc->CTL &= ~ADC_CTL_WKTEN_Msk;
adc->IER &= ~ADC_IER_WKTIEN_Msk;
//TODO outpw(REG_SYS_WKUPSER, inpw(REG_SYS_WKUPSER) & ~(1 << 26));
}
break;
case SWITCH_5WIRE_ON: /* Wire Mode Switch to 5-Wire */
{
adc->CTL |= ADC_CTL_WMSWCH_Msk;
}
break;
case SWITCH_5WIRE_OFF: /* Wire Mode Switch to 4-Wire */
{
adc->CTL &= ~ADC_CTL_WMSWCH_Msk;
}
break;
case T_ON: /* Enable Touch detection function */
{
adc->CONF |= ADC_CONF_TEN_Msk;
}
break;
case T_OFF: /* Disable Touch detection function */
{
adc->CONF &= ~ADC_CONF_TEN_Msk;
}
break;
case TAVG_ON: /* Enable Touch Mean average for X and Y function */
{
adc->CONF |= ADC_CONF_TMAVDIS_Msk;
}
break;
case TAVG_OFF: /* Disable Touch Mean average for X and Y function */
{
adc->CONF &= ~ADC_CONF_TMAVDIS_Msk;
}
break;
case Z_ON: /* Enable Press measure function */
{
adc->CONF |= ADC_CONF_ZEN_Msk;
}
break;
case Z_OFF: /* Disable Press measure function */
{
adc->CONF &= ~ADC_CONF_ZEN_Msk;
#if defined(BSP_USING_ADC_TOUCH)
rt_mq_control(psNuAdc->m_pmqTouchXYZ, RT_IPC_CMD_RESET, RT_NULL);
#endif
}
break;
case TZAVG_ON: /* Enable Pressure Mean average for Z1 and Z2 function */
{
adc->CONF |= ADC_CONF_ZMAVDIS_Msk;
}
break;
case TZAVG_OFF: /* Disable Pressure Mean average for Z1 and Z2 function */
{
adc->CONF &= ~ADC_CONF_ZMAVDIS_Msk;
}
break;
case NAC_ON: /* Enable Normal AD Conversion */
{
adc->CONF |= (ADC_CONF_NACEN_Msk | ADC_CONF_REFSEL_AVDD33);
}
break;
case NAC_OFF: /* Disable Normal AD Conversion */
{
adc->CONF &= ~ADC_CONF_NACEN_Msk;
}
break;
case SWITCH_CH:
{
int chn = (int)args;
if (chn >= ADC_CH_NUM)
{
return -ret;
}
adc->CONF &= ~ADC_CONF_CHSEL_Msk;
adc->CONF |= (chn << ADC_CONF_CHSEL_Pos);
}
break;
default:
return -(ret);
}
return RT_EOK;
}
static rt_err_t _nu_adc_open(rt_device_t dev, rt_uint16_t oflag)
{
nu_adc_t psNuAdc = (nu_adc_t)dev;
ADC_T *adc = psNuAdc->base;
/* Enable ADC engine clock */
nu_sys_ipclk_enable(psNuAdc->clkidx);
/* Reset the ADC IP */
nu_sys_ip_reset(psNuAdc->rstidx);
/* Enable ADC Power */
ADC_POWER_ON(adc);
/* Enable ADC to high speed mode */
adc->CONF |= ADC_CONF_SPEED_Msk;
/* Enable interrupt */
rt_hw_interrupt_umask(psNuAdc->irqn);
/* Enable Normal AD Conversion */
_nu_adc_control(dev, NAC_ON, RT_NULL);
return RT_EOK;
}
static rt_err_t _nu_adc_close(rt_device_t dev)
{
nu_adc_t psNuAdc = (nu_adc_t)dev;
ADC_T *adc = psNuAdc->base;
/* Disable Normal AD Conversion */
_nu_adc_control(dev, NAC_OFF, RT_NULL);
/* Disable interrupt */
rt_hw_interrupt_mask(psNuAdc->irqn);
/* Disable ADC Power */
ADC_POWER_DOWN(adc);
/* Disable ADC engine clock */
nu_sys_ipclk_disable(psNuAdc->clkidx);
return RT_EOK;
}
static const struct rt_adc_ops nu_adc_ops =
{
nu_adc_enabled,
nu_adc_convert,
};
/* nu_adc_enabled - Enable ADC clock and wait for ready */
static rt_err_t nu_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
{
nu_adc_t psNuADC = (nu_adc_t)device;
RT_ASSERT(device);
if (channel >= ADC_CH_NUM)
return -(RT_EINVAL);
if (enabled)
{
psNuADC->chn_mask |= (1 << channel);
}
else
{
psNuADC->chn_mask &= ~(1 << channel);
}
if (psNuADC->chn_mask > 0 && ((rt_device_t)device)->ref_count == 0)
{
_nu_adc_open((rt_device_t)device, 0);
((rt_device_t)device)->ref_count = 1;
}
else if ((psNuADC->chn_mask == 0) && ((rt_device_t)device)->ref_count == 1)
{
_nu_adc_close((rt_device_t)device);
((rt_device_t)device)->ref_count = 0;
}
return RT_EOK;
}
static rt_err_t nu_adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
{
rt_err_t ret = RT_EOK;
RT_ASSERT(device);
RT_ASSERT(value);
if (channel >= ADC_CH_NUM)
{
ret = RT_EINVAL;
goto exit_nu_adc_convert;
}
else if ((ret = _nu_adc_control((rt_device_t)device, SWITCH_CH, (void *)channel)) != RT_EOK)
{
goto exit_nu_adc_convert;
}
else if ((ret = _nu_adc_control((rt_device_t)device, START_MST, (void *)value)) != RT_EOK)
{
goto exit_nu_adc_convert;
}
exit_nu_adc_convert:
return (-ret) ;
}
int rt_hw_adc_init(void)
{
rt_err_t result = RT_ERROR;
rt_device_t psDev = &g_sNuADC.dev.parent;
result = rt_hw_adc_register(&g_sNuADC.dev, g_sNuADC.name, &nu_adc_ops, &g_sNuADC);
RT_ASSERT(result == RT_EOK);
result = _nu_adc_init(psDev);
RT_ASSERT(result == RT_EOK);
g_sNuADC.m_psSem = rt_sem_create("adc_mst_sem", 0, RT_IPC_FLAG_FIFO);
RT_ASSERT(g_sNuADC.m_psSem);
#if defined(BSP_USING_ADC_TOUCH)
g_sNuADC.m_pmqTouchXYZ = rt_mq_create("ADC_TOUCH_XYZ", sizeof(struct nu_adc_touch_data), TOUCH_MQ_LENGTH, RT_IPC_FLAG_FIFO);
RT_ASSERT(g_sNuADC.m_pmqTouchXYZ);
g_sNuADC.psRtTouchMenuTimer = rt_timer_create("TOUCH_SMPL_TIMER", nu_adc_touch_smpl, (void *)&g_sNuADC, DEF_ADC_TOUCH_SMPL_TICK, RT_TIMER_FLAG_PERIODIC);
RT_ASSERT(g_sNuADC.psRtTouchMenuTimer);
#endif
rt_memset(&g_sNuADC.m_isr, 0, sizeof(g_sNuADC.m_isr));
rt_memset(&g_sNuADC.m_wkisr, 0, sizeof(g_sNuADC.m_wkisr));
g_sNuADC.m_isr[eAdc_MF].cbfunc = AdcMenuStartCallback;
g_sNuADC.m_isr[eAdc_MF].private_data = (uint32_t)&g_sNuADC;
return (int)result;
}
INIT_BOARD_EXPORT(rt_hw_adc_init);
#endif //#if defined(BSP_USING_ADC)
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