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Diffstat (limited to 'src/occ/gpe/apss_altitude.pS')
| -rwxr-xr-x | src/occ/gpe/apss_altitude.pS | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/occ/gpe/apss_altitude.pS b/src/occ/gpe/apss_altitude.pS new file mode 100755 index 0000000..6deac1d --- /dev/null +++ b/src/occ/gpe/apss_altitude.pS @@ -0,0 +1,163 @@ +# ***************************************************************************** +# @file apss_altitude.S +# @brief Read the altitude from the APSS +# + +# ***************************************************************************** +# +# @page ChangeLogs Change Logs +# @section apss_altitude.S APSS_ALTITUDE.S +# @verbatim +# +# Flag Def/Fea Userid Date Description +# ------- ---------- -------- ---------- ---------------------------------- +# @rc003 rickylie 02/03/2012 Verify & Clean Up OCC Headers & Comments +# +# @endverbatim +# +# ***************************************************************************** + + + ////////////////////////////////////////////////////////////////////// + // Includes + ////////////////////////////////////////////////////////////////////// + .nolist +#include "pgp.h" +#include "pgas.h" + .list + + ////////////////////////////////////////////////////////////////////// + // Define Address Space + ////////////////////////////////////////////////////////////////////// + .oci + + ////////////////////////////////////////////////////////////////////// + // Define Symbols + ////////////////////////////////////////////////////////////////////// + +#include <pss_constants.h> + +#define GPE_PROG_ID 0x0002 + + ////////////////////////////////////////////////////////////////////// + // Define Structures + ////////////////////////////////////////////////////////////////////// + + // Declare the offsets of the struct that will be passed to the + // GPE program via the ETR register + // + // struct G_gpe_apss_read_altitude_args = + // { + .struct 0 +ERROR_RC: + .struct ERROR_RC + 8 +ERROR_FFDC: + .struct ERROR_FFDC + 8 +ALTITUDE: + // }; + + + ////////////////////////////////////////////////////////////////////// + // Begin Program + ////////////////////////////////////////////////////////////////////// + + .text + +#include <gpe_macros.h> +#include <pss_macros.h> + + + //-------------------------------------------------------------------- + // PORE-GPE Routine Specification: + // + // Name: GPE_apss_read_altitude + // + // Description: Initialize APSS GPIO pins for Input/Output, Interrupt + // Drive H/L + // + // Inputs: G_gpe_apss_read_altitude_args + // struct { + // PoreGpeErrorStruct error; + // uint16_t altitude; // This is where the altitude will be stored (output) + // uint8_t reserved[6]; // Requried since GPE only does 8 byte writes. + // } G_gpe_apss_read_altitude_args + // struct { + // uint64_t rc; // This should be read as 63:32=addr, 31:0=rc + // uint64_t ffdc; // Whatever GPE program puts in for FFDC data + // } PoreGpeErrorStruct; + // + // Outputs: Altitude (and FFDC on failure) + // + // Flow: 7/20/11 FN=GPE_apss_set_composite_mode + // + // References: APSS FUnctional Specification v0.7.18 + // GPE_apss_access_scoms.odt (summary of regisers/data) + // + // End PORE-GPE Routine Specification + //-------------------------------------------------------------------- + .global GPE_apss_read_altitude +GPE_apss_read_altitude: + + // Copy passed Structure Pointer into A1 + mr A1, ETR + + // Wait for SPI operations to be complete (10usec timeout) + _wait_for_spi_ops_complete 10, error_timeout + + // Setup control regs + // frame_size=16, out_count=16, in_delay1=never, in_count2=16 + _putscom SPIPSS_P2S_CTRL_REG0, 0x410FC00004000000 + // bridge_enable, clock_divider=7, 2 frames + _putscom SPIPSS_P2S_CTRL_REG1, 0x801C400000000000 + // inter_frame_delay=25 (2.5usec) + _putscom SPIPSS_P2S_CTRL_REG2, 0x000C800000000000 + + // APSS command to get the altitude (APSS cmd 0x9000) + li D0, 0x9000000000000000 + _putscom_d0 SPIPSS_P2S_WDATA_REG + + // Start SPI transaction + _putscom SPIPSS_P2S_COMMAND_REG, 0x8000000000000000 + + // wait 10usec for command to complete + waits (10 * MICROSECONDS) + + // Wait for SPI operations to be complete (10usec timeout) + _wait_for_spi_ops_complete 10, error_altitude_timeout + + // Read altitude and store in structure + _getscom SPIPSS_P2S_RDATA_REG + // The scom data for that cmd is in 2nd two bytes of the register (shift left 2 bytes) + rols D0, D0, 16 + std D0, ALTITUDE, A1 + + halt // End of GPE_apss_initialize_gpio + + +error_statusreg: + // An error/reserved bit was set when reading p2s status register... + // D0: P2S_STATUS_REG + _saveffdc GPE_PROG_ID, 0x0002 + halt + + +error_timeout: + // p2s_ongoing bit was never cleared after several retries... + // D0: P2S_STATUS_REG + _saveffdc GPE_PROG_ID, 0x0001 + halt + + +error_altitude_timeout: + // After sending the read altitude command, the p2s_ongoing bit was + // never cleared after several retries... + // D0: P2S_STATUS_REG + _saveffdc GPE_PROG_ID, 0x0003 + halt + + + ////////////////////////////////////////////////////////////////////// + // End of Program + ////////////////////////////////////////////////////////////////////// + + |
