As reference - this is initialisation code for the SLCD on the FRDM-KL46
// Use MCGIRCLK (fast IRC) as SLCD source
//
#define CONFIGURE_SLCD() MCG_C1 &= ~(MCG_C1_IREFS); MCG_C1 |= (MCG_C1_IRCLKEN | MCG_C1_IREFSTEN); \
POWER_UP(5, SIM_SCGC5_SLCD); \
LCD_GCR = (LCD_GCR_RVEN | (0x08000000 & LCD_GCR_RVTRIM_MASK) | LCD_GCR_CPSEL | LCD_GCR_LADJ_MASK | LCD_GCR_VSUPPLY | LCD_GCR_SOURCE | LCD_GCR_LCLK_1 | LCD_GCR_DUTY_4BP); \
LCD_AR = (LCD_AR_BRATE_MASK & 3); \
LCD_BPENL = (SLCD_PIN_19 | SLCD_PIN_18); \
LCD_BPENH = (SLCD_PIN_H_52 | SLCD_PIN_H_40); \
LCD_PENL = ((SLCD_PIN_17 | SLCD_PIN_11 | SLCD_PIN_10 | SLCD_PIN_8 | SLCD_PIN_7) | (SLCD_PIN_19 | SLCD_PIN_18)); \
LCD_PENH = ((SLCD_PIN_H_53 | SLCD_PIN_H_38 | SLCD_PIN_H_37) | (SLCD_PIN_H_52 | SLCD_PIN_H_40)); \
fnClearSLCD(); \
WRITE_SLCD(43TO40, 0x00000001); \
WRITE_SLCD(55TO52, 0x00000002); \
WRITE_SLCD(19TO16, 0x04080000); \
LCD_GCR = (LCD_GCR_LCDEN | LCD_GCR_RVEN | (0x08000000 & LCD_GCR_RVTRIM_MASK) | LCD_GCR_CPSEL | LCD_GCR_LADJ_MASK | LCD_GCR_VSUPPLY | LCD_GCR_SOURCE | LCD_GCR_LCLK_1 | LCD_GCR_DUTY_4BP)
// The SLCD controller may retain segment settings across resets so this initialisation routine is used to ensure all are cleared when starting
//
extern void fnClearSLCD(void)
{
unsigned long *ptrSegments = LCD_WF3TO0_ADDR;
int i = 0;
while (i++ < SEGMENT_REGISTER_COUNT) {
*ptrSegments++ = 0;
}
}And the following is a clock display updated every second by a 1s interrupt (eg. from RTC)
static void _rtc_second_interrupt(void) // seconds interrupt call-back handler
{
RTC_SETUP rtc_setup;
rtc_setup.command = RTC_GET_TIME;
fnConfigureRTC(&rtc_setup); // get the present time
if (IS_POWERED_UP(5, SIM_SCGC5_SLCD)) { // display time as long as the SLCD has been enabled
fnTimeDisplay(rtc_setup.ucHours, rtc_setup.ucMinutes, rtc_setup.ucSeconds);
}
}with the complete SLCD code below to allow digits to be simply displayed.
// Register LCD_WF19TO16 and LCD_WF39TO36 (tens of hours)
//
#define SEVEN_SEGMENT_0_TOP 0x00000800 // 17-8
#define SEVEN_SEGMENT_0_MID 0x00000400 // 37-4
#define SEVEN_SEGMENT_0_BOT 0x00000100 // 37-1
#define SEVEN_SEGMENT_0_T_L 0x00000800 // 37-8
#define SEVEN_SEGMENT_0_B_L 0x00000200 // 37-2
#define SEVEN_SEGMENT_0_T_R 0x00000400 // 17-4
#define SEVEN_SEGMENT_0_B_R 0x00000200 // 17-2
#define SEVEN_SEGMENT_0_17 (SEVEN_SEGMENT_0_TOP | SEVEN_SEGMENT_0_T_R | SEVEN_SEGMENT_0_B_R)
#define SEVEN_SEGMENT_0_37 (SEVEN_SEGMENT_0_MID | SEVEN_SEGMENT_0_BOT | SEVEN_SEGMENT_0_T_L | SEVEN_SEGMENT_0_B_L)
#define SEVEN_SEGMENT_0_0 (SEVEN_SEGMENT_0_17 | SEVEN_SEGMENT_0_37)
#define SEVEN_SEGMENT_0_1 (SEVEN_SEGMENT_0_T_R | SEVEN_SEGMENT_0_B_R)
#define SEVEN_SEGMENT_0_2 ((SEVEN_SEGMENT_0_TOP | SEVEN_SEGMENT_0_T_R | SEVEN_SEGMENT_0_MID | SEVEN_SEGMENT_0_B_L | SEVEN_SEGMENT_0_BOT) & SEVEN_SEGMENT_0_17)
// Register LCD_WF11TO8 and LCD_WF7TO4 (hours)
//
#define SEVEN_SEGMENT_1_TOP 0x00000008 // 8-8
#define SEVEN_SEGMENT_1_MID 0x04000000 // 7-4
#define SEVEN_SEGMENT_1_BOT 0x01000000 // 7-1
#define SEVEN_SEGMENT_1_T_L 0x08000000 // 7-8
#define SEVEN_SEGMENT_1_B_L 0x02000000 // 7-2
#define SEVEN_SEGMENT_1_T_R 0x00000004 // 8-4
#define SEVEN_SEGMENT_1_B_R 0x00000002 // 8-2
#define SEVEN_SEGMENT_1__7 (SEVEN_SEGMENT_1_MID | SEVEN_SEGMENT_1_BOT | SEVEN_SEGMENT_1_T_L | SEVEN_SEGMENT_1_B_L)
#define SEVEN_SEGMENT_1__8 (SEVEN_SEGMENT_1_TOP | SEVEN_SEGMENT_1_T_R | SEVEN_SEGMENT_1_B_R)
#define SEVEN_SEGMENT_1 (SEVEN_SEGMENT_1__7 | SEVEN_SEGMENT_1__8)
#define SEVEN_SEGMENT_1_0 (SEVEN_SEGMENT_1 & ~(SEVEN_SEGMENT_1_MID))
#define SEVEN_SEGMENT_1_1 (SEVEN_SEGMENT_1_T_R | SEVEN_SEGMENT_1_B_R)
#define SEVEN_SEGMENT_1_2 (SEVEN_SEGMENT_1 & ~(SEVEN_SEGMENT_1_T_L | SEVEN_SEGMENT_1_B_R))
#define SEVEN_SEGMENT_1_3 (SEVEN_SEGMENT_1 & ~(SEVEN_SEGMENT_1_T_L | SEVEN_SEGMENT_1_B_L))
#define SEVEN_SEGMENT_1_4 (SEVEN_SEGMENT_1 & ~(SEVEN_SEGMENT_1_TOP | SEVEN_SEGMENT_1_B_L | SEVEN_SEGMENT_1_BOT))
#define SEVEN_SEGMENT_1_5 (SEVEN_SEGMENT_1 & ~(SEVEN_SEGMENT_1_B_L | SEVEN_SEGMENT_1_T_R))
#define SEVEN_SEGMENT_1_6 (SEVEN_SEGMENT_1 & ~(SEVEN_SEGMENT_1_T_R))
#define SEVEN_SEGMENT_1_7 (SEVEN_SEGMENT_1_T_R | SEVEN_SEGMENT_1_B_R | SEVEN_SEGMENT_1_TOP)
#define SEVEN_SEGMENT_1_8 SEVEN_SEGMENT_1
#define SEVEN_SEGMENT_1_9 (SEVEN_SEGMENT_1 & ~(SEVEN_SEGMENT_1_B_L))
// Registers LCD_WF39TO36 and LCD_WF55TO52 (tens of minutes)
//
#define SEVEN_SEGMENT_2_TOP 0x00080000 // 38-8
#define SEVEN_SEGMENT_2_MID 0x00000400 // 53-4
#define SEVEN_SEGMENT_2_BOT 0x00000100 // 53-1
#define SEVEN_SEGMENT_2_T_L 0x00000800 // 53-8
#define SEVEN_SEGMENT_2_B_L 0x00000200 // 53-2
#define SEVEN_SEGMENT_2_T_R 0x00040000 // 38-4
#define SEVEN_SEGMENT_2_B_R 0x00020000 // 38-2
#define SEVEN_SEGMENT_2_38 (SEVEN_SEGMENT_2_TOP | SEVEN_SEGMENT_2_T_R | SEVEN_SEGMENT_2_B_R)
#define SEVEN_SEGMENT_2_53 (SEVEN_SEGMENT_2_MID | SEVEN_SEGMENT_2_BOT | SEVEN_SEGMENT_2_T_L | SEVEN_SEGMENT_2_B_L)
#define SEVEN_SEGMENT_2 (SEVEN_SEGMENT_2_38 | SEVEN_SEGMENT_2_53)
#define SEVEN_SEGMENT_2_0 (SEVEN_SEGMENT_2 & ~(SEVEN_SEGMENT_2_MID))
#define SEVEN_SEGMENT_2_1 (SEVEN_SEGMENT_2_T_R | SEVEN_SEGMENT_2_B_R)
#define SEVEN_SEGMENT_2_2 (SEVEN_SEGMENT_2 & ~(SEVEN_SEGMENT_2_T_L | SEVEN_SEGMENT_2_B_R))
#define SEVEN_SEGMENT_2_3 (SEVEN_SEGMENT_2 & ~(SEVEN_SEGMENT_2_T_L | SEVEN_SEGMENT_2_B_L))
#define SEVEN_SEGMENT_2_4 (SEVEN_SEGMENT_2 & ~(SEVEN_SEGMENT_2_TOP | SEVEN_SEGMENT_2_B_L | SEVEN_SEGMENT_2_BOT))
#define SEVEN_SEGMENT_2_5 (SEVEN_SEGMENT_2 & ~(SEVEN_SEGMENT_2_B_L | SEVEN_SEGMENT_2_T_R))
#define SEVEN_SEGMENT_2_6 (SEVEN_SEGMENT_2 & ~(SEVEN_SEGMENT_2_T_R))
#define SEVEN_SEGMENT_2_7 (SEVEN_SEGMENT_2_T_R | SEVEN_SEGMENT_2_B_R | SEVEN_SEGMENT_2_TOP)
#define SEVEN_SEGMENT_2_8 (SEVEN_SEGMENT_2)
#define SEVEN_SEGMENT_2_9 (SEVEN_SEGMENT_2 & ~(SEVEN_SEGMENT_2_B_L))
// Register LCD_WF11TO8 (minutes)
//
#define SEVEN_SEGMENT_3_TOP 0x08000000 // 11-8
#define SEVEN_SEGMENT_3_MID 0x00040000 // 10-4
#define SEVEN_SEGMENT_3_BOT 0x00010000 // 10-1
#define SEVEN_SEGMENT_3_T_L 0x00080000 // 10-8
#define SEVEN_SEGMENT_3_B_L 0x00020000 // 10-2
#define SEVEN_SEGMENT_3_T_R 0x04000000 // 11-4
#define SEVEN_SEGMENT_3_B_R 0x02000000 // 11-2
#define SEGMENT_COLON 0x01
#define SEVEN_SEGMENT_3 (SEVEN_SEGMENT_3_TOP | SEVEN_SEGMENT_3_MID | SEVEN_SEGMENT_3_BOT | SEVEN_SEGMENT_3_T_L | SEVEN_SEGMENT_3_B_L | SEVEN_SEGMENT_3_T_R | SEVEN_SEGMENT_3_B_R)
#define SEVEN_SEGMENT_3_0 (SEVEN_SEGMENT_3 & ~(SEVEN_SEGMENT_3_MID))
#define SEVEN_SEGMENT_3_1 (SEVEN_SEGMENT_3_T_R | SEVEN_SEGMENT_3_B_R)
#define SEVEN_SEGMENT_3_2 (SEVEN_SEGMENT_3 & ~(SEVEN_SEGMENT_3_T_L | SEVEN_SEGMENT_3_B_R))
#define SEVEN_SEGMENT_3_3 (SEVEN_SEGMENT_3 & ~(SEVEN_SEGMENT_3_T_L | SEVEN_SEGMENT_3_B_L))
#define SEVEN_SEGMENT_3_4 (SEVEN_SEGMENT_3 & ~(SEVEN_SEGMENT_3_TOP | SEVEN_SEGMENT_3_B_L | SEVEN_SEGMENT_3_BOT))
#define SEVEN_SEGMENT_3_5 (SEVEN_SEGMENT_3 & ~(SEVEN_SEGMENT_3_B_L | SEVEN_SEGMENT_3_T_R))
#define SEVEN_SEGMENT_3_6 (SEVEN_SEGMENT_3 & ~(SEVEN_SEGMENT_3_T_R))
#define SEVEN_SEGMENT_3_7 (SEVEN_SEGMENT_3_T_R | SEVEN_SEGMENT_3_B_R | SEVEN_SEGMENT_3_TOP)
#define SEVEN_SEGMENT_3_8 SEVEN_SEGMENT_3
#define SEVEN_SEGMENT_3_9 (SEVEN_SEGMENT_3 & ~(SEVEN_SEGMENT_3_B_L))
static const unsigned long ulSegment1[] = { // hours 0..9
SEVEN_SEGMENT_1_0,
SEVEN_SEGMENT_1_1,
SEVEN_SEGMENT_1_2,
SEVEN_SEGMENT_1_3,
SEVEN_SEGMENT_1_4,
SEVEN_SEGMENT_1_5,
SEVEN_SEGMENT_1_6,
SEVEN_SEGMENT_1_7,
SEVEN_SEGMENT_1_8,
SEVEN_SEGMENT_1_9,
};
static const unsigned long ulSegment2[] = { // tens of minutes 0..5
SEVEN_SEGMENT_2_0,
SEVEN_SEGMENT_2_1,
SEVEN_SEGMENT_2_2,
SEVEN_SEGMENT_2_3,
SEVEN_SEGMENT_2_4,
SEVEN_SEGMENT_2_5,
};
static const unsigned long ulSegment3[] = { // minutes 0..9
(SEVEN_SEGMENT_3_0 >> 0),
(SEVEN_SEGMENT_3_1 >> 0),
(SEVEN_SEGMENT_3_2 >> 0),
(SEVEN_SEGMENT_3_3 >> 0),
(SEVEN_SEGMENT_3_4 >> 0),
(SEVEN_SEGMENT_3_5 >> 0),
(SEVEN_SEGMENT_3_6 >> 0),
(SEVEN_SEGMENT_3_7 >> 0),
(SEVEN_SEGMENT_3_8 >> 0),
(SEVEN_SEGMENT_3_9 >> 0),
};
static void fnTimeDisplay(unsigned char ucHours, unsigned char ucMinutes, unsigned char ucSeconds)
{
unsigned long ulRegister;
ulRegister = LCD_WF19TO16;
ulRegister &= ~(SEVEN_SEGMENT_0_17);
switch (ucHours/10) {
case 1:
ulRegister |= (SEVEN_SEGMENT_0_B_R | SEVEN_SEGMENT_0_T_R); // set the tens of hours ('1')
break;
case 2:
ulRegister |= (SEVEN_SEGMENT_0_TOP | SEVEN_SEGMENT_0_T_R); // set the tens of hours ('2')
break;
}
WRITE_SLCD(19TO16, ulRegister); // tens of hours (part 1)
ulRegister = LCD_WF39TO36;
ulRegister &= ~(SEVEN_SEGMENT_0_37);
switch (ucHours/10) {
case 2:
ulRegister |= (SEVEN_SEGMENT_0_MID | SEVEN_SEGMENT_0_B_L | SEVEN_SEGMENT_0_BOT); // set the tens of hours ('2')
break;
}
WRITE_SLCD(39TO36, ulRegister); // tens of hours (part 2)
ucHours -= ((ucHours/10) * 10);
ulRegister = LCD_WF7TO4;
ulRegister &= ~(SEVEN_SEGMENT_1__7);
ulRegister |= (ulSegment1[ucHours] & SEVEN_SEGMENT_1__7); // set the hours
WRITE_SLCD(7TO4, ulRegister); // hours (part 1)
ulRegister = LCD_WF11TO8;
ulRegister &= ~(SEVEN_SEGMENT_1__8);
ulRegister |= (ulSegment1[ucHours] & SEVEN_SEGMENT_1__8); // set the hours
WRITE_SLCD(11TO8, ulRegister); // hours (part 2)
ulRegister = LCD_WF39TO36;
ulRegister &= ~(SEVEN_SEGMENT_2_38);
ulRegister |= (ulSegment2[ucMinutes/10] & SEVEN_SEGMENT_2_38); // set the tens of minutes
WRITE_SLCD(39TO36, ulRegister); // tens of minutes (part 1)
ulRegister = LCD_WF55TO52;
ulRegister &= ~(SEVEN_SEGMENT_2_53);
ulRegister |= (ulSegment2[ucMinutes/10] & SEVEN_SEGMENT_2_53); // set the tens of minutes
WRITE_SLCD(55TO52, ulRegister); // tens of minutes (part 2)
ulRegister = LCD_WF11TO8;
ulRegister &= ~(SEVEN_SEGMENT_3);
ucMinutes -= ((ucMinutes/10) * 10);
ulRegister |= ulSegment3[ucMinutes];
WRITE_SLCD(11TO8, ulRegister); // minutes
TOGGLE_SLCD(11, SEGMENT_COLON); // toggle ':'
}
And finally, what it looks like when run in the uTasker simulator:
Regards
Mark
