diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/idp/console/duart.c')
| -rw-r--r-- | c/src/lib/libbsp/m68k/idp/console/duart.c | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/c/src/lib/libbsp/m68k/idp/console/duart.c b/c/src/lib/libbsp/m68k/idp/console/duart.c deleted file mode 100644 index d0a7d9af4d..0000000000 --- a/c/src/lib/libbsp/m68k/idp/console/duart.c +++ /dev/null @@ -1,263 +0,0 @@ -/*######################################################### -# -# This code is a modified version of what you will find at the -# end of the IDP User's manual. The original code is copyrighted -# by Motorola and Motorola Semiconductor Products as well as -# Motorola Software products group. -# -# Modifications to the original IDP code by Doug McBride, Colorado -# Space Grant College. Modifications include a means of accessing -# port B of the duart as well as port A as well as modifications for -# buffering and RTEMS support. Modifications are provided -# as is and may not be correct. -# -# Rob Savoye provided the format for the mc68681 header file -# -# Joel Sherrill provided inspiration for recoding my original assembly -# for this file into C (a good idea) -# -##########################################################*/ - -#include <bsp.h> -#include <rtems/ringbuf.h> - -rtems_isr C_Receive_ISR(rtems_vector_number vector); -extern Ring_buffer_t Console_Buffer[]; - -extern unsigned char inbuf[]; -extern unsigned char inbuf_portb[]; -extern unsigned tail; -extern unsigned tail_portb; -unsigned char Pit_initialized = 0; - -/*##################################################################### -# The volatile routine to initialize the duart -- port a and port b -######################################################################*/ -void init_pit() -{ - /* - * ports A & B while configuring PIT by: - * - * + disable Interrupt Mask Register - * + disable port A transmitter - * + disable port A receiver - * + disable port B transmitter - * + disable port B receiver - */ - - MC68681_WRITE(DUART_ADDR, MC68681_INTERRUPT_MASK_REG, 0x00); - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_A ,MC68681_MODE_REG_DISABLE_TX); - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_A, MC68681_MODE_REG_DISABLE_RX); - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_B, MC68681_MODE_REG_DISABLE_TX); - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_B, MC68681_MODE_REG_DISABLE_RX); - - /* - * install ISR for ports A and B - */ - set_vector(C_Receive_ISR, (MC68230_VECT+MC68230_H3VECT), 1); - - /* - * initialize pit - * - * set mode to 0 -- disable all ports - * set up pirq and piack - * all pins on port b are input - * submode 1x, h3 interrupt enabled - * setup pivr - * turn on all ports - */ - MC68230_WRITE(MC68230_PGCR, 0x00); - MC68230_WRITE(MC68230_PSRR, 0x18); - MC68230_WRITE(MC68230_PBDDR, 0x00); - MC68230_WRITE(MC68230_PBCR, 0x82); - MC68230_WRITE(MC68230_PIVR, MC68230_VECT); - MC68230_WRITE(MC68230_PGCR, 0x20); - - /* - * For some reason, the reset of receiver/transmitter only works for - * the first time around -- it garbles the output otherwise - * (e.g., sp21) - */ - if (!Pit_initialized) - { - /* - * initialize the duart registers on port b - * WARNING:OPTIMIZER MAY ONLY EXECUTE THIRD STATEMENT IF NOT VOLATILE - * - * reset tx, channel b - * reset rx, channel b - * reset mr pointer, ch - */ - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_B, MC68681_MODE_REG_RESET_TX); - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_B, MC68681_MODE_REG_RESET_RX); - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_B, MC68681_MODE_REG_RESET_MR_PTR); - - /* - * initialize the duart registers on port a - * WARNING:OPTIMIZER MAY ONLY EXECUTE THIRD STATEMENT IF NOT VOLATILE - * - * reset tx, channel a - * reset rx, channel a - * reset mr pointer, ch - */ - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_A, MC68681_MODE_REG_RESET_TX); - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_A, MC68681_MODE_REG_RESET_RX); - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_A, MC68681_MODE_REG_RESET_MR_PTR); - - Pit_initialized = 1; - } - - /* - * Init the general registers of the duart - * - * init ivr - * init imr - * init acr - * init ctur - * init ctlr - * init opcr - * init cts - */ - MC68681_WRITE(DUART_ADDR, MC68681_INTERRUPT_VECTOR_REG, - MC68681_INTERRUPT_VECTOR_INIT); - MC68681_WRITE(DUART_ADDR, MC68681_INTERRUPT_MASK_REG, - MC68681_IR_RX_READY_A | MC68681_IR_RX_READY_B); - MC68681_WRITE(DUART_ADDR, MC68681_AUX_CTRL_REG, MC68681_CLEAR); - MC68681_WRITE(DUART_ADDR, MC68681_COUNTER_TIMER_UPPER_REG, 0x00); - MC68681_WRITE(DUART_ADDR, MC68681_COUNTER_TIMER_LOWER_REG, 0x02); - MC68681_WRITE(DUART_ADDR, MC68681_OUTPUT_PORT_CONFIG_REG, MC68681_CLEAR); - MC68681_WRITE(DUART_ADDR, MC68681_OUTPUT_PORT_SET_REG, 0x01); - - /* - * init the actual serial port for port a - * - * Set Baud Rate to 9600 - * Set Stop bit length of 1 - * enable Transmit and receive - */ - MC68681_WRITE(DUART_ADDR, MC68681_CLOCK_SELECT_REG_A, MC68681_BAUD_RATE_MASK_9600); - MC68681_WRITE(DUART_ADDR, MC68681_MODE_REG_1A, - (MC68681_8BIT_CHARS | MC68681_NO_PARITY)); - MC68681_WRITE(DUART_ADDR, MC68681_MODE_REG_2A,MC68681_STOP_BIT_LENGTH_1); - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_A, - (MC68681_MODE_REG_ENABLE_TX | MC68681_MODE_REG_ENABLE_RX)); - - /* - * init the actual serial port for port b - * init csrb -- 9600 baud - */ - MC68681_WRITE(DUART_ADDR, MC68681_CLOCK_SELECT_REG_B, MC68681_BAUD_RATE_MASK_9600); - -#define EIGHT_BITS_NO_PARITY -#ifdef EIGHT_BITS_NO_PARITY - /* - * Set 8 Bit characters with no parity - */ - MC68681_WRITE(DUART_ADDR, MC68681_MODE_REG_1B, - (MC68681_NO_PARITY | MC68681_8BIT_CHARS) ); -#else - /* - * Set 7 Bit Characters with parity - */ - MC68681_WRITE(DUART_ADDR, MC68681_MODE_REG_1B, - (MC68681_WITH_PARITY | MC68681_7BIT_CHARS) ); -#endif - - /* - * Set Stop Bit length to 1 - * Disable Recieve and transmit on B - */ - MC68681_WRITE(DUART_ADDR, MC68681_MODE_REG_2B,MC68681_STOP_BIT_LENGTH_1); - MC68681_WRITE(DUART_ADDR, MC68681_COMMAND_REG_B, - (MC68681_MODE_REG_ENABLE_TX | MC68681_MODE_REG_ENABLE_RX) ); -} - -/*##################################################################### -# interrupt handler for receive of character from duart on ports A & B -#####################################################################*/ -rtems_isr C_Receive_ISR(rtems_vector_number vector) -{ - volatile unsigned char *_addr; - - /* - * Clear pit interrupt. - */ - _addr = (unsigned char *) (MC68230_PIT_ADDR + MC68230_PITSR); - *_addr = 0x04; - - /* - * check port A first for input - * extract rcvrdy on port B - * set ptr to recieve buffer and read character into ring buffer - */ - _addr = (unsigned char *) (DUART_ADDR + MC68681_STATUS_REG_A); - if (*_addr & MC68681_RX_READY) /* extract rcvrdy on port A */ - { - _addr = (unsigned char *) (DUART_ADDR + MC68681_RECEIVE_BUFFER_A); - Ring_buffer_Add_character( &Console_Buffer[ 0 ], *_addr ); - } - - /* - * If not on port A, let's check port B - * extract rcvrdy on port B - * set ptr to recieve buffer and read character into ring buffer - */ - else - { - _addr = (unsigned char *) (DUART_ADDR + MC68681_STATUS_REG_B); - if (*_addr & MC68681_RX_READY) /* extract rcvrdy on port B */ - { - _addr = (unsigned char *) (DUART_ADDR + MC68681_RECEIVE_BUFFER_B); - Ring_buffer_Add_character( &Console_Buffer[ 1 ], *_addr ); - } - - /* - * if not ready on port A or port B, must be an error - * if error, get out so that fifo is undisturbed - */ - } -} - -/*##################################################################### -# This is the routine that actually transmits a character one at a time -# This routine transmits on port A of the IDP board -#####################################################################*/ -void transmit_char(char ch) -{ - volatile unsigned char *_addr; - - /* - * Get SRA (extract txrdy) - */ - _addr = (unsigned char *) (DUART_ADDR + MC68681_STATUS_REG_A); - while (!(*_addr & MC68681_TX_READY)) - { - } - - /* - * transmit character over port A - */ - MC68681_WRITE(DUART_ADDR, MC68681_TRANSMIT_BUFFER_A, ch); -} - -/*##################################################################### -# This is the routine that actually transmits a character one at a time -# This routine transmits on port B of the IDP board -#####################################################################*/ -void transmit_char_portb(char ch) -{ - volatile unsigned char *_addr; - - /* - * Get SRB (extract txrdy) - */ - _addr = (unsigned char *) (DUART_ADDR + MC68681_STATUS_REG_B); - while (!(*_addr & MC68681_TX_READY)) - { - } - - /* - * transmit character over port B - */ - MC68681_WRITE(DUART_ADDR, MC68681_TRANSMIT_BUFFER_B, ch); -} |