FreeCalypso > hg > fc-magnetite
view src/cs/drivers/drv_app/r2d/board/uwire.c @ 506:be7731ddf4e8
configs/hybrid-gpf: build OSX from source
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 25 Jun 2018 02:57:46 +0000 |
parents | 945cf7f506b2 |
children |
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/************************************************************************************ * uwire.c : contains driver for the uwire HD module * * * * * * Author: Davide Carpegna * * * * version: 1.0 * * * * Date: 22/09/2000 * * (C) Copyright 2000 by Texas Instruments Incorporated, All Rights Reserved * ************************************************************************************/ #include "rv/general.h" #include "r2d/uwire.h" #include "rvf/rvf_api.h" /********************************************************************/ /* set the DC input to low for command transmission */ /* */ /********************************************************************/ void set_DC_low(void) { * (volatile UINT16 *) GPIO_OUT &= ~(0x02); //gpio(1) ->0 } /********************************************************************/ /* set the DC input to high for data transmission */ /* */ /********************************************************************/ void set_DC_high(void) { * (volatile UINT16 *) GPIO_OUT |= 0x02; //gpio(1) ->1 } /********************************************************************/ /* transmit commands to the lcd */ /* */ /********************************************************************/ void lcd_transmit_cmd(UINT8 cmd) { set_DC_low(); * (volatile UINT16 *) TDR = cmd <<8; * (volatile UINT16 *) CSR |= NB_BITS_WR_8 + CS_CMD + START ; // transmit command data while (((* (volatile UINT16 *) CSR) & CSRB) != 0 ); // wait for end of WRITE * (volatile UINT16 *) CSR &= ~CS_CMD; // clears Chip Select } /********************************************************************/ /* transmit data to the lcd */ /* */ /********************************************************************/ void lcd_transmit_data(UINT8 data) { set_DC_high(); * (volatile UINT16 *) TDR = data <<8; * (volatile UINT16 *) CSR |= NB_BITS_WR_8 + CS_CMD + START ; // transmit data //while (((* (volatile UINT16 *) CSR) & CSRB) != 0 ); // wait for end of WRITE //* (volatile UINT16 *) CSR &= ~CS_CMD; // clears Chip Select } extern BOOLEAN lcd_polling(void) { if (((* (volatile UINT16 *) CSR) & CSRB) == 0 ) { * (volatile UINT16 *) CSR &= ~CS_CMD; // clears Chip Select return(TRUE); } else return(FALSE); } /********************************************************************/ /* initialize the uwire parameters for the lcd */ /* */ /********************************************************************/ void uwire_init_lcd() { * ( UINT16 *) GPIO_INOUT &= ~(0x0002); // configures gpio(1) in output mode * ( UINT16 *) CNTL_RST &= ~(0x04); // releases reset_out * ( UINT16 *) CNTL_RST |= (0x04); // set reset_out to 0 rvf_delay(RVF_MS_TO_TICKS(1)); // waits for 5 ms * ( UINT16 *) CNTL_RST &= ~(0x04); // releases reset_out * (volatile UINT16 *) SR1 = CS1_FRQ_FINT_4 ; // F_INT/4 -> 13M/4 = 3.25 Mhz * (volatile UINT16 *) SR3 = SR3_CLK_EN; // enables the uwire clock * (volatile UINT16 *) CSR = INDEX_CS1; // selects CS1 }