diff options
Diffstat (limited to 'board/trab/tsc2000.c')
| -rw-r--r-- | board/trab/tsc2000.c | 72 |
1 files changed, 36 insertions, 36 deletions
diff --git a/board/trab/tsc2000.c b/board/trab/tsc2000.c index ad11860..df2d87f 100644 --- a/board/trab/tsc2000.c +++ b/board/trab/tsc2000.c @@ -38,7 +38,7 @@ void spi_init(void) int i; /* Configure I/O ports. */ - gpio->PDCON = (gpio->PDCON & 0xF3FFFF) | 0x040000; + gpio->PDCON = (gpio->PDCON & 0xF3FFFF) | 0x040000; gpio->PGCON = (gpio->PGCON & 0x0F3FFF) | 0x008000; gpio->PGCON = (gpio->PGCON & 0x0CFFFF) | 0x020000; gpio->PGCON = (gpio->PGCON & 0x03FFFF) | 0x080000; @@ -48,7 +48,7 @@ void spi_init(void) spi->ch[0].SPPRE = 0x1F; /* Baud-rate ca. 514kHz */ spi->ch[0].SPPIN = 0x01; /* SPI-MOSI holds Level after last bit */ spi->ch[0].SPCON = 0x1A; /* Polling, Prescaler, Master, CPOL=0, - CPHA=1 */ + CPHA=1 */ /* Dummy byte ensures clock to be low. */ for (i = 0; i < 10; i++) { @@ -73,7 +73,7 @@ void tsc2000_write(unsigned short reg, unsigned short data) SET_CS_TOUCH(); command = reg; - spi->ch[0].SPTDAT = (command & 0xFF00) >> 8; + spi->ch[0].SPTDAT = (command & 0xFF00) >> 8; spi_wait_transmit_done(); spi->ch[0].SPTDAT = (command & 0x00FF); spi_wait_transmit_done(); @@ -94,12 +94,12 @@ unsigned short tsc2000_read (unsigned short reg) SET_CS_TOUCH(); command = 0x8000 | reg; - spi->ch[0].SPTDAT = (command & 0xFF00) >> 8; + spi->ch[0].SPTDAT = (command & 0xFF00) >> 8; spi_wait_transmit_done(); spi->ch[0].SPTDAT = (command & 0x00FF); spi_wait_transmit_done(); - spi->ch[0].SPTDAT = 0xFF; + spi->ch[0].SPTDAT = 0xFF; spi_wait_transmit_done(); data = spi->ch[0].SPRDAT; spi->ch[0].SPTDAT = 0xFF; @@ -112,7 +112,7 @@ unsigned short tsc2000_read (unsigned short reg) void tsc2000_set_mux (unsigned int channel) { - S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); + S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); CLR_MUX1_ENABLE; CLR_MUX2_ENABLE; CLR_MUX3_ENABLE; CLR_MUX4_ENABLE; @@ -189,7 +189,7 @@ void tsc2000_set_mux (unsigned int channel) void tsc2000_set_range (unsigned int range) { - S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); + S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); switch (range) { case 1: @@ -216,8 +216,8 @@ u16 tsc2000_read_channel (unsigned int channel) udelay(3 * TSC2000_DELAY_BASE); tsc2000_write(TSC2000_REG_ADC, 0x2036); - adc_wait_conversion_done (); - res = tsc2000_read(TSC2000_REG_AUX1); + adc_wait_conversion_done (); + res = tsc2000_read(TSC2000_REG_AUX1); return res; } @@ -225,36 +225,36 @@ u16 tsc2000_read_channel (unsigned int channel) s32 tsc2000_contact_temp (void) { long adc_pt1000, offset; - long u_pt1000; + long u_pt1000; long contact_temp; - tsc2000_reg_init (); + tsc2000_reg_init (); tsc2000_set_range (3); - adc_pt1000 = tsc2000_read_channel (14); - debug ("read channel 14 (pt1000 adc value): %ld\n", adc_pt1000); - - offset = tsc2000_read_channel (15); - debug ("read channel 15 (offset): %ld\n", offset); - - /* - * Formula for calculating voltage drop on PT1000 resistor: u_pt1000 = - * x_range3 * (adc_raw - offset) / 10. Formula to calculate x_range3: - * x_range3 = (2500 * (1000000 + err_vref + err_amp3)) / (4095*6). The - * error correction Values err_vref and err_amp3 are assumed as 0 in - * u-boot, because this could cause only a very small error (< 1%). - */ - u_pt1000 = (101750 * (adc_pt1000 - offset)) / 10; - debug ("u_pt1000: %ld\n", u_pt1000); - - if (tsc2000_interpolate(u_pt1000, Pt1000_temp_table, - &contact_temp) == -1) { - printf ("%s: error interpolating PT1000 vlaue\n", - __FUNCTION__); - return (-1000); - } - debug ("contact_temp: %ld\n", contact_temp); + adc_pt1000 = tsc2000_read_channel (14); + debug ("read channel 14 (pt1000 adc value): %ld\n", adc_pt1000); + + offset = tsc2000_read_channel (15); + debug ("read channel 15 (offset): %ld\n", offset); + + /* + * Formula for calculating voltage drop on PT1000 resistor: u_pt1000 = + * x_range3 * (adc_raw - offset) / 10. Formula to calculate x_range3: + * x_range3 = (2500 * (1000000 + err_vref + err_amp3)) / (4095*6). The + * error correction Values err_vref and err_amp3 are assumed as 0 in + * u-boot, because this could cause only a very small error (< 1%). + */ + u_pt1000 = (101750 * (adc_pt1000 - offset)) / 10; + debug ("u_pt1000: %ld\n", u_pt1000); + + if (tsc2000_interpolate(u_pt1000, Pt1000_temp_table, + &contact_temp) == -1) { + printf ("%s: error interpolating PT1000 vlaue\n", + __FUNCTION__); + return (-1000); + } + debug ("contact_temp: %ld\n", contact_temp); return contact_temp; } @@ -262,7 +262,7 @@ s32 tsc2000_contact_temp (void) void tsc2000_reg_init (void) { - S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); + S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); tsc2000_write(TSC2000_REG_ADC, 0x2036); tsc2000_write(TSC2000_REG_REF, 0x0011); @@ -315,5 +315,5 @@ int tsc2000_interpolate(long value, long data[][2], long *result) void adc_wait_conversion_done(void) { - while (!(tsc2000_read(TSC2000_REG_ADC) & (1 << 14))); + while (!(tsc2000_read(TSC2000_REG_ADC) & (1 << 14))); } |