參數(shù)資料
型號(hào): MC33991
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Gauge Driver Integrated Circuit(標(biāo)尺驅(qū)動(dòng)器集成電路)
中文描述: 儀表驅(qū)動(dòng)集成電路(標(biāo)尺驅(qū)動(dòng)器集成電路)
文件頁數(shù): 34/36頁
文件大小: 660K
代理商: MC33991
33991
34
Go to: www.freescale.com
/* Step 15 */
Command_Gauge
(0x10,0x00);
/* Check SO bit ST4 to see if Gauge 0 has moved */
If
((status & 0x10) != 0)
/* If it has moved, then keep track of position */
/* Wait until 24 steps are finished then send a RTZ command (Step 17) */
/* Null Read to get status */
/* Step 16 */
Command_Gauge
(0x80,0x02);
/* Send RTZ to Gauge 0 */
/* Step 17 */
Command_Gauge
(0x10,0x00);
/* Read Status until RTZ is done */
While
((status & 0x04) != 0)
{
Command_Gauge
(0x10,0x00);}
/* Null Read to get status */
/* Step 18 */
Command_Gauge
(0x80,0x03);
/* Send RTZ to Gauge 1 */
/* Step 19 */
Command_Gauge
(0x10,0x00);
/* Read Status until RTZ is done */
While
((status & 0x08) != 0)
{
Command_Gauge
(0x01,0x00);}
/* Null Read to get status */
/* Step 20 */
Command_Gauge
(0x00,0x00);
/* Put device to sleep by setting RSTB to logic 0 */
/* Disable Gauges and go into Standby */
}
void Command_Gauge
(char MSB, char LSB)
/*This subroutine sends the GDIC commands on the SPI port */
{
PORTS = 0x00;
SP0DR = MSB;
While
((SP0SR & 0x80) == 0);
RTZdata = SP0DR;
SP0DR = LSB;
While
((SP0SR & 0x80) == 0);
status = SP0DR;
PORTS = 0x04;
}
/* Chip select low (active) */
/* send first byte of gauge command */
/* wait for Rxflag (first byte) */
/* Read status MSB */
/* send second byte of command */
/* wait for Rxflag (second byte) */
/* read status LSB */
/* Chip select high (deactivated) */
/* Motorola Semiconductor Products Sector */
/* October 4, 2002 */
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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